CN110995074B - Motor control device and motor device - Google Patents

Abstract

Provided are a motor control device and a motor device, which can inhibit the increase of the number of power lines for switching the setting of a motor control part. When the speed command signal (Vsp) having a voltage value equal to or higher than the 1 st threshold (TH 1) is inputted in a state where no power supply voltage is inputted, and the voltage value of the speed command signal (Vsp) is reduced to be lower than the 1 st threshold (TH 1), the power storage unit (15) continues for a predetermined time or longer and outputs a Control Signal (CS) having a voltage value equal to or higher than the 1 st threshold (TH 1) to the setting switching unit (111). After the voltage value of the speed command signal (Vsp) is lowered below the 1 st threshold (TH 1), the power supply voltage is inputted. When a Control Signal (CS) having a voltage value equal to or greater than a 1 st threshold (TH 1) is input while the power supply voltage is input, a setting switching unit (111) switches the setting of the motor control unit (11).

Description

Motor control device and motor device

Technical Field

The present invention relates to a motor control device and a motor device.

Background

Conventionally, in a DC motor driving device, a rotational speed command, a start/stop signal, a rotational direction signal, and a brake signal, which are issued from a host controller, are input to a speed control circuit, and an energization signal for controlling a switching element is output from the speed control circuit (for example, patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 10-127079

However, in the conventional DC motor driving device, a dedicated power line is wired to input a rotation direction signal for switching the rotation direction of the motor to the speed control circuit. In other words, dedicated power lines are routed for switching the setting of the speed control circuit. Therefore, the number of the power-on wires increases.

Disclosure of Invention

The present invention has been made in view of the above-described problems, and an object thereof is to provide a motor control device and a motor device capable of suppressing an increase in the number of power lines for switching settings to a motor control unit.

An exemplary motor control device according to the present invention includes a motor control unit, a 1 st power line, a 2 nd power line, and a power storage unit. The motor control unit controls the motor. The 1 st power line inputs a power supply voltage to the motor control unit. The 2 nd power line inputs a speed command signal for controlling the rotational speed of the motor to the motor control unit. And the power storage unit is connected with the 2 nd power-on line, receives the speed command signal and stores power. The motor control unit includes a rotation control unit and a setting switching unit. When the speed command signal is input in a state where the power supply voltage is input to the motor control unit, the rotation control unit controls the rotation speed of the motor based on the speed command signal. A setting switching unit switches the setting of the motor control unit. When the voltage value of the speed command signal is reduced below the 1 st threshold after the speed command signal having a voltage value equal to or higher than the 1 st threshold is input to the motor control unit in a state where the power supply voltage is not input to the motor control unit, the power storage unit continues for a predetermined time or longer and outputs a control signal having a voltage value equal to or higher than the 1 st threshold to the setting switching unit. After the voltage value of the speed command signal is reduced below the 1 st threshold, the power supply voltage is input to the motor control unit. The setting switching unit switches the setting of the motor control unit when the control signal having the voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit.

An exemplary motor device of the present invention includes the motor control device and the motor.

Effects of the invention

According to the present invention as exemplified, a motor control device and a motor device capable of suppressing an increase in the number of power lines for switching settings to a motor control unit can be provided.

Drawings

Fig. 1 is a diagram showing a motor system according to embodiment 1 of the present invention.

Fig. 2 is a timing chart showing a power supply voltage, a speed command signal, and a control signal when the setting of the motor control unit is switched to the 1 st setting in the motor system according to embodiment 1.

Fig. 3 is a timing chart showing a power supply voltage, a speed command signal, and a control signal when the setting of the motor control unit is switched to the 2 nd setting in the motor system according to embodiment 1.

Fig. 4 is a circuit diagram showing the power storage unit of the motor system according to embodiment 1.

Fig. 5 is a flowchart showing the operation of the motor system according to embodiment 1.

Fig. 6 is a diagram showing a motor system according to modification 1 of embodiment 1.

Fig. 7 is a diagram showing a motor system according to modification 2 of embodiment 1.

Fig. 8 is a diagram showing a motor system according to embodiment 2 of the present invention.

Fig. 9 is a timing chart showing a power supply voltage, a speed command signal, and a control signal when the setting of the motor control unit is switched to the 1 st setting in the motor system according to embodiment 2.

Fig. 10 is a timing chart showing a power supply voltage, a speed command signal, and a control signal when the setting of the motor control unit is switched to the 2 nd setting in the motor system according to embodiment 2.

Fig. 11 is a flowchart showing the operation of the motor system according to embodiment 2.

Description of the reference numerals

1: a motor control device; 11: a motor control unit; 111: a setting switching part; 111a: a rotation direction switching unit; 111b: a rotation output switching unit; 117: a power input switching section; FL: a1 st power line; SL: a 2 nd power line; m: a motor; b1: motor device

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will not be repeated.

(embodiment 1)

A motor system A1 according to embodiment 1 of the present invention will be described with reference to fig. 1 to 5. First, a motor system A1 will be described with reference to fig. 1.

Fig. 1 is a diagram showing a motor system A1. The motor system A1 is mounted on an electronic device (not shown). As shown in fig. 1, the motor system A1 has a motor device B1 and a controller B2. The motor device B1 includes a motor M and a motor control device 1. The motor M rotates. In embodiment 1, the motor M is a three-phase brushless motor having a U-phase, a V-phase, and a W-phase. The type of the motor M is merely an example, and is not particularly limited.

The motor control device 1 controls the motor M. The motor control device 1 includes a motor control unit 11. The motor control unit 11 is, for example, a driver, and includes a driver IC (Integrated Circuit: integrated circuit) or a microcomputer. The motor control unit 11 controls the motor M. The motor control unit 11 rotates the motor M in the 1 st rotation direction and in the 2 nd rotation direction opposite to the 1 st rotation direction. The 1 st rotation direction is, for example, a normal rotation direction. The 2 nd rotation direction is, for example, the reverse direction.

The motor control device 1 further has an inverter 13. The motor control unit 11 controls the motor M via the inverter 13. Specifically, the motor control unit 11 outputs a plurality of PWM (pulse width modulation: pulse Width Modulation) signals to the inverter 13. The inverter 13 generates a plurality of driving signals U, V, W from the plurality of PWM signals. The inverter 13 supplies a plurality of drive signals U, V, W to the motor M. The inverter 13 has, for example, 6 transistors (not shown). The motor M rotates in response to a plurality of driving signals U, V, W.

The motor control device 1 further includes a 1 st power line FL and a 2 nd power line SL. The 1 st power line FL and the 2 nd power line SL are connected to the motor control device 1 and the controller B2.

The controller B2 controls the motor device B1. Specifically, the controller B2 controls the motor control unit 11. The motor control unit 11 controls the inverter 13 according to the control of the controller B2, and as a result, controls the rotation of the motor M.

The controller B2 has a power supply unit 3 and a microcomputer 5. The microcomputer 5 controls the power supply section 3. The power supply unit 3 generates a power supply voltage Vcc and a speed command signal Vsp under the control of the microcomputer 5. The speed command signal Vsp controls the rotational speed of the motor M. The speed command signal Vsp controls switching of the setting of the motor control unit 11. In embodiment 1, the speed command signal Vsp is an analog signal. The power supply unit 3 includes, for example, a power supply circuit that generates a power supply voltage Vcc and a speed command signal Vsp. The power supply unit 3 includes, for example, a 1 st power supply circuit generating a power supply voltage Vcc and a 2 nd power supply circuit generating a speed command signal Vsp.

Specifically, the 1 st power line FL and the 2 nd power line SL are connected to the power supply unit 3 and the motor control unit 11.

Then, the power supply unit 3 outputs the power supply voltage Vcc to the 1 st power supply line FL. As a result, the 1 st power line FL inputs the power supply voltage Vcc to the motor control unit 11. The motor control unit 11 operates with electric power based on the power supply voltage Vcc.

The power supply unit 3 outputs a speed command signal Vsp to the 2 nd power line SL. As a result, the 2 nd power line SL inputs the speed command signal Vsp to the motor control unit 11. The motor control unit 11 controls the motor M via the inverter 13 such that the rotational speed of the motor M becomes the rotational speed indicated by the speed command signal Vsp. As a result, the motor M rotates at the rotation speed indicated by the speed command signal Vsp.

The power supply voltage Vcc is greater than the voltage value of the speed command signal Vsp. The power supply voltage Vcc is, for example, 15V.

The motor control device 1 further includes a power storage unit 15 and a control signal line CL. The power storage unit 15 is connected to the 2 nd power line SL. Then, the 2 nd power line SL inputs the speed command signal Vsp to the power storage unit 15. As a result, the power storage unit 15 receives the speed command signal Vsp to store power. Further, the power storage unit 15 is connected to a control signal line CL. Details of the power storage unit 15 and the control signal line CL will be described later.

With continued reference to fig. 1, the details of the motor control unit 11 will be described. The motor control unit 11 includes a setting switching unit 111 and a rotation control unit 113. The rotation control unit 113 is connected to the 2 nd energizing line SL. When the speed command signal Vsp is input to the rotation control unit 113 in a state where the power supply voltage Vcc is input to the motor control unit 11, the rotation control unit 113 controls the rotation speed of the motor M based on the speed command signal Vsp. Specifically, the rotation control unit 113 controls the rotation speed of the motor M via the inverter 13 according to the speed command signal Vsp.

The setting switching unit 111 is connected to the control signal line CL. The setting switching unit 111 switches the setting of the motor control unit 11 in response to the control signal CS output from the power storage unit 15 to the control signal line CL.

Specifically, in a state where the power supply voltage Vcc is input to the motor control unit 11, when the control signal CS having a voltage value lower than the 1 st threshold TH1 is input to the setting switching unit 111, the setting switching unit 111 switches the setting to the motor control unit 11 to the 1 st setting. The 1 st threshold TH1 is, for example, 2V.

On the other hand, when the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting. The 2 nd setting is different from the 1 st setting.

The setting switching unit 111 includes a setting holding unit 1111. The setting holding section 1111 holds a setting to the motor control section 11. Specifically, when the setting switching unit 111 switches the setting to the motor control unit 11, the setting holding unit 1111 holds the switched setting. The motor control unit 11 operates according to the setting held by the setting holding unit 1111. On the other hand, when the input of the power supply voltage Vcc to the motor control unit 11 is stopped or the input of the speed command signal Vsp to the motor control unit 11 is stopped, the setting holding unit 1111 resets the held setting.

In embodiment 1, "setting" means "setting to the motor control unit 11". In other words, "setting" means "setting related to the motor M".

Next, with reference to fig. 1 and 2, control when the setting of the motor control unit 11 is switched to the 1 st setting will be described. Fig. 2 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting to the motor control unit 11 is switched to the 1 st setting. In fig. 2, the potential of the 1 st power line FL, the potential of the 2 nd power line SL, and the potential of the control signal line CL are shown on the vertical axis. In addition, the horizontal axis represents time.

As shown in fig. 1 and 2, at time t1, the power supply voltage Vcc is input from the 1 st power supply line FL to the motor control unit 11. At a time before the time t1, the 1 st power line FL has the potential Vcc0. The potential Vcc0 is smaller than the power supply voltage Vcc. The potential Vcc0 is, for example, 0V.

The potential Vcc0 is different from the power supply voltage Vcc because it cannot supply power to operate the motor control unit 11. The state in which the 1 st power line FL has the potential Vcc0 indicates that the supply of the power supply voltage Vcc to the motor control unit 11 is stopped. That is, the state in which the 1 st power line FL has the potential Vcc0 indicates that the power supply voltage Vcc is off. On the other hand, the state in which the power supply voltage Vcc is input to the 1 st power-on line FL indicates that the power supply voltage Vcc is on.

At a time t2 after the time t1, a speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input from the 2 nd power line SL to the motor control unit 11. Therefore, power storage unit 15 outputs control signal CS having a voltage value lower than 1 st threshold TH1 to setting switching unit 111 via control signal line CL. At time t2, power supply voltage Vcc is input to motor control unit 11 from 1 st power supply line FL.

At a time before time t2, the 2 nd power line SL has the potential Vsp0. The potential Vsp0 is smaller than the voltage value of the speed command signal Vsp. The potential Vsp0 is, for example, 0V. The potential Vsp0 does not control the rotation speed of the motor M and does not control the switching of the setting to the motor control unit 11, and is thus different from the speed command signal Vsp. The state in which the 2 nd power line SL has the potential Vsp0 indicates that the input of the speed command signal Vsp is stopped. That is, the state in which the 2 nd power line SL has the potential Vsp0 indicates that the speed command signal Vsp is off. On the other hand, the state in which the speed command signal Vsp is input to the 2 nd power line SL indicates that the speed command signal Vsp is on.

At time t2, since the control signal CS having a voltage value lower than the 1 st threshold TH1 is input in a state where the power supply voltage Vcc is input, the setting switching unit 111 switches the setting to the motor control unit 11 to the 1 st setting. As a result, the setting for the motor control unit 11 is determined, and the setting holding unit 1111 holds the 1 st setting.

After the setting of the motor control unit 11 is determined, a speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input from the 2 nd power line SL to the rotation control unit 113. Then, the rotation control unit 113 controls the rotation speed of the motor M based on the speed command signal Vsp.

In the example of fig. 2, the voltage value of the speed command signal Vsp and the voltage value of the control signal CS are substantially the same.

As described above with reference to fig. 1 and 2, in embodiment 1, the setting of the motor control unit 11 can be switched to the 1 st setting according to the state changes of the power supply voltage Vcc and the speed command signal Vsp.

Specifically, in embodiment 1, the setting of the motor control unit 11 is switched to the 1 st setting by the control of the power supply voltage Vcc and the speed command signal Vsp. Therefore, the motor control device 1 does not have a dedicated power line for switching the setting to the motor control unit 11 to the 1 st setting. In other words, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are used instead of the power line for switching the setting to the motor control unit 11 to the 1 st setting. Therefore, the motor device B1 and the motor control device 1 can suppress an increase in the number of current-carrying lines for switching the setting to the motor control unit 11.

Next, with reference to fig. 1 and 3, control when the setting of the motor control unit 11 is switched to the 2 nd setting will be described. Fig. 3 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting to the motor control unit 11 is switched to the 2 nd setting. In fig. 3, the potential of the 1 st power line FL, the potential of the 2 nd power line SL, and the potential of the control signal line CL are shown on the vertical axis. In addition, the horizontal axis represents time.

As shown in fig. 1 and 3, at time t3, the speed command signal Vsp is input from the 2 nd power line SL to the motor control unit 11. Therefore, power storage unit 15 outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to setting switching unit 111 via control signal line CL. Further, at a time before time t3, the 2 nd power line SL has the potential Vsp0. Further, at time t3, since the 1 st power line FL has the potential Vcc0, the power supply voltage Vcc is not input.

At time t4 after time t3, the voltage value of the speed command signal Vsp of the 2 nd power line SL decreases below the 1 st threshold TH 1. The voltage value of the reduced speed command signal Vsp is greater than the potential Vsp0. Time t4 indicates when the voltage value of the speed command signal Vsp starts to decrease.

Meanwhile, from time t3 to time t4, power storage unit 15 stores power. Therefore, at time t4, when the voltage value of speed command signal Vsp decreases below 1 st threshold TH1, power storage unit 15 discharges to control signal line CL from time t 4. As a result, power storage unit 15 outputs control signal CS having a reduced voltage value to control signal line CL from time t 4. In this case, power storage unit 15 outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to control signal line CL for a time P or longer from time t 4. Therefore, at time t5, in a state where the power supply voltage Vcc is input to the 1 st power supply line FL, the voltage value of the control signal CS is equal to or higher than the 1 st threshold TH 1. As a result, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting. Then, at time t5, the setting for the motor control unit 11 is determined, and the setting holding unit 1111 holds the 2 nd setting.

Although not shown in the drawings for simplicity, after the motor control unit 11 is set, a speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input from the 2 nd power line SL to the rotation control unit 113. Then, the rotation control unit 113 controls the rotation speed of the motor M based on the speed command signal Vsp. When the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input, the rotation control unit 113 does not perform control of the rotation speed of the motor M based on the speed command signal Vsp.

In the example of fig. 3, the voltage value of the speed command signal Vsp and the voltage value of the control signal CS are substantially the same from time t3 to time t 4. After time t5, power storage unit 15 discharges, and the voltage value of speed command signal Vsp and the voltage value of control signal CS are substantially the same.

As described above, in embodiment 1, the setting of the motor control unit 11 can be switched to the 2 nd setting based on the state change of the power supply voltage Vcc and the speed command signal Vsp, which is "the state in which the power supply voltage Vcc is not input→the state in which the speed command signal Vsp equal to or higher than the 1 st threshold TH1 is input→the state in which the speed command signal Vsp is lowered to be lower than the 1 st threshold TH1→the state in which the power supply voltage Vcc is input".

Specifically, in embodiment 1, in a state where the power supply voltage Vcc is not input to the motor control unit 11 from the 1 st power supply line FL, the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input to the motor control unit 11 from the 2 nd power supply line SL, and then, when the voltage value of the speed command signal Vsp decreases to be lower than the 1 st threshold TH1, the power storage unit 15 continues for a predetermined time period P or longer via the control signal line CL to output the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 to the setting switching unit 111.

After the voltage value of the speed command signal Vsp is lowered below the 1 st threshold TH1, the power supply voltage Vcc is input to the motor control unit 11 from the 1 st power supply line FL.

Further, when the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is input from the control signal line CL to the setting switching unit 111 in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting.

Therefore, in embodiment 1, the motor control device 1 does not have a dedicated power line for switching only the setting to the motor control unit 11 to the 2 nd setting. In other words, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are substituted for the power lines for switching the setting to the motor control unit 11 to the 2 nd setting. Therefore, the motor device B1 and the motor control device 1 can further suppress an increase in the number of the energizing lines for switching the setting to the motor control unit 11.

Further, according to embodiment 1, the control signal CS is input to the setting switching unit 111 in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. Accordingly, the setting switching unit 111 switches the setting of the motor control unit 11 in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. As a result, during the rotation of the motor M, the setting of the motor control unit 11 can be suppressed from being switched by the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH 1.

In embodiment 1, for example, before time t3, when the input of the power supply voltage Vcc to the motor control unit 11 is stopped, the setting switching unit 111 resets the setting to the motor control unit 11. Specifically, when the input of the power supply voltage Vcc is stopped, the setting switching section 111 resets the setting held by the setting holding section 1111.

Then, after the setting of the motor control unit 11 is reset, as shown in fig. 3, in a state in which the power supply voltage Vcc is not input to the motor control unit 11, the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input to the motor control unit 11 from the 2 nd conduction line SL, and then, when the voltage value of the speed command signal Vsp is reduced to be lower than the 1 st threshold TH1, the power storage unit 15 continues for a predetermined time P or more via the control signal line CL and outputs the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 to the setting switching unit 111. As a result, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting.

That is, in embodiment 1, after the setting of the motor control unit 11 is reset, the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is output to the setting switching unit 111, and the setting of the motor control unit 11 is switched to the 2 nd setting. Therefore, the setting of the motor control unit 11 can be suppressed from being switched to the 2 nd setting during the rotation of the motor M.

Next, details of power storage unit 15 will be described with reference to fig. 3 and 4. Fig. 4 is a circuit diagram showing the power storage unit 15. As shown in fig. 4, power storage unit 15 includes a diode 151 and a plurality of capacitors 153. In embodiment 1, power storage unit 15 has two capacitors 153. The power storage unit 15 may have one capacitor 153.

The anode of the diode 151 is connected to the 2 nd power line SL. The cathode of the diode 151 is connected to the control signal line CL. The plurality of capacitors 153 are connected in parallel with the control signal line CL. Specifically, one electrode of each capacitor 153 is connected to the control signal line CL. The other electrode of each capacitor 153 is grounded.

When the speed command signal Vsp is input to the 2 nd power line SL, the diode 151 causes a current to flow from the 1 st power line FL to the control signal line CL. Therefore, the potential of the control signal line CL is substantially the same as the voltage value of the speed command signal Vsp. The potential of the control signal line CL becomes the control signal CS.

While the speed command signal Vsp is input to the 2 nd power line SL, each capacitor 153 stores power. Therefore, the potential of each capacitor 153 is substantially the same as the voltage value of the speed command signal Vsp. For example, each capacitor 153 stores power from time t3 to time t 4.

Then, when the voltage value of the speed command signal Vsp decreases, the respective capacitors 153 start to discharge. Accordingly, the potential of the control signal line CL decreases in response to a decrease in the voltage value of the speed command signal Vsp. That is, the voltage value of the control signal CS decreases in response to a decrease in the voltage value of the speed command signal Vsp. For example, the voltage value of the control signal CS decreases from time t 4.

The capacitance of the capacitor 153 is set so that the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 can be continuously output for a predetermined time P or longer after the voltage value of the speed command signal Vsp decreases.

As described above with reference to fig. 4, according to embodiment 1, the power storage unit 15 can be formed using inexpensive and simple electronic components and circuit structures (the diode 151 and the capacitor 153).

Next, with reference to fig. 1 and 5, an operation of the motor system A1 when the setting of the motor control unit 11 is switched to the 2 nd setting will be described. Fig. 5 is a flowchart showing the operation of the motor control device 1. As shown in fig. 5, the motor system A1 executes the processing of steps S1 to S6.

As shown in fig. 1 and 5, in step S1, the power supply unit 3 inputs the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 from the 2 nd power supply line SL to the motor control unit 11 in a state where the power supply voltage Vcc is not inputted from the 1 st power supply line FL.

In step S2, the power supply unit 3 reduces the voltage value of the speed command signal Vsp input to the motor control unit 11 below the 1 st threshold TH 1.

In step S3, power storage unit 15 continues for a predetermined time P or longer and outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to setting switching unit 111.

In step S4, the setting switching unit 111 determines whether or not the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is input in a state where the power supply voltage Vcc is input.

If the determination in step S4 is negative, the process proceeds to step S1.

On the other hand, when the determination in step S4 is affirmative, the process advances to step S5. The "affirmative determination" indicates that the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 is determined to be input in a state where the power supply voltage Vcc is input.

In step S5, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting.

In step S6, the rotation control unit 113 controls the rotation speed of the motor M based on the speed command signal Vsp.

As described above with reference to fig. 5, according to embodiment 1, the setting of the motor control unit 11 can be switched to the 2 nd setting by controlling the input timing of the power supply voltage Vcc and the speed command signal Vsp. Therefore, in the motor system A1, an increase in the number of current-carrying lines for switching the setting to the motor control unit 11 can be suppressed.

(modification 1)

A modification 1 of embodiment 1 of the present invention will be described with reference to fig. 2, 3, and 6. In the motor system A1 of modification 1, modification 1 differs from embodiment 1 described with reference to fig. 1 to 5 mainly in that the setting of the motor control unit 11 indicates "setting of the rotation direction of the motor M" and "setting of the output form of the rotation signal PG indicating the rotation speed of the motor M". Hereinafter, differences between modification 1 and embodiment 1 will be mainly described.

Fig. 6 is a diagram showing a motor system A1 according to modification 1. As shown in fig. 6, the motor control device 1 according to modification 1 includes a rotational position detection unit SN in addition to the configuration of the motor control device 1 described with reference to fig. 1. The rotational position detecting unit SN detects the rotational position of a rotor (not shown) of the motor M. Then, the rotational position detection unit SN outputs the rotational position signal RP to the motor control unit 11. The rotational position signal RP indicates the rotational position of the rotor of the motor M. In embodiment 1, the rotational position detection portion SN includes a plurality of hall elements. A plurality of Hall elements detect the magnetic pole position of the rotor. The rotation control unit 113 controls the rotation speed of the motor M via the inverter 13 based on the speed command signal Vsp and the rotation position signal RP.

Further, the motor control device 1 of modification 1 includes two power storage units 15 and two control signal lines CL that are separate from each other. Each power storage unit 15 is connected to the 2 nd power line SL. Then, the 2 nd power line SL inputs the speed command signal Vsp to each power storage unit 15. As a result, each power storage unit 15 receives the speed command signal Vsp and stores the power. Each power storage unit 15 is connected to a control signal line CL.

The motor control unit 11 of the motor control device 1 has a rotation signal output unit 115 in addition to the configuration of the motor control unit 11 described with reference to fig. 1. The rotation signal output unit 115 converts the rotation position signal RP indicating the rotation position detected by the rotation position detection unit SN into a rotation signal PG and outputs the rotation signal PG to the microcomputer 5. The rotation signal PG indicates the rotation speed of the motor M.

The setting switching unit 111 of the motor control unit 11 includes a rotation output switching unit 111b. The rotation output switching unit 111b switches the setting of the output form of the rotation signal PG. The output form of the rotation signal PG refers to the expression of the rotation speed of the motor M indicated by the rotation signal PG. The rotation output switching unit 111b is connected to the control signal line CL. The rotational output switching unit 111b switches the setting of the output form of the rotational signal PG in response to the control signal CS output from the power storage unit 15b of the two power storage units 15 to the control signal line CL.

Specifically, as described below, the setting of the output form of the rotation signal PG is switched to the 1 st output form.

That is, in a state where the power supply voltage Vcc is input to the motor control section 11, when the control signal CS having a voltage value lower than the 1 st threshold TH1 is input to the rotation output switching section 111b, the rotation output switching section 111b switches the output form of the rotation signal PG to the 1 st output form. Therefore, according to the 1 st modification, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are used instead as power lines for switching the setting of the output form of the rotation signal PG to the 1 st output form. As a result, the motor device B1 and the motor control device 1 can suppress an increase in the number of power-on lines for switching the setting of the output form of the rotation signal PG.

More specifically, the rotation output switching unit 111b switches the output form of the rotation signal PG to the 1 st output form in the same step as when the setting switching unit 111 described with reference to fig. 2 switches the setting to the motor control unit 11 to the 1 st setting. Therefore, in modification 1, regarding the rotation output switching unit 111b, in the description of fig. 2 in embodiment 1, the "setting switching unit 111" is referred to as "rotation output switching unit 111b", and the "power storage unit 15" is referred to as "power storage unit 15b". The "setting and holding unit 1111" is referred to as "setting and holding unit 1111b", the "setting of the motor control unit 11" is referred to as "setting of the output form of the rotation signal PG", and the "1 st setting" is referred to as "1 st output form".

On the other hand, as described below, the setting of the output form of the rotation signal PG is switched to the 2 nd output form. The 2 nd output form is different from the 1 st output form.

That is, when the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is input to the setting switching unit 111 in a state where the power supply voltage Vcc is input to the motor control unit 11, the setting switching unit 111 switches the setting of the output form of the rotation signal PG to the 2 nd output form. Therefore, according to the 1 st modification, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are used instead as power lines for switching the setting of the output form of the rotation signal PG to the 2 nd output form. As a result, the motor device B1 and the motor control device 1 can further suppress an increase in the number of power-on lines for switching the setting of the output form of the rotation signal PG.

Specifically, the rotation output switching unit 111b switches the output form of the rotation signal PG to the 2 nd output form in the same step as when the setting switching unit 111 described with reference to fig. 3 and 5 switches the setting to the motor control unit 11 to the 2 nd setting.

Therefore, according to modification 1, the control signal CS is input to the rotation output switching unit 111b in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. As a result, the rotation output switching unit 111b switches the output form of the rotation signal PG to the 2 nd output form in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. Therefore, during the rotation of the motor M, the switching of the output form of the rotation signal PG by the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 can be suppressed.

In modification 1, the rotation output switching unit 111b is referred to as "rotation output switching unit 111b" and the power storage unit 15 is referred to as "power storage unit 15b" in the description of fig. 3 and 5 in embodiment 1. The "setting and holding unit 1111" is referred to as "setting and holding unit 1111b", the "setting of the motor control unit 11" is referred to as "setting of the output form of the rotation signal PG", and the "2 nd setting" is referred to as "2 nd output form".

The rotation output switching unit 111b includes a setting holding unit 1111b. The setting holding unit 1111b holds a setting of the output form of the rotation signal PG. Specifically, when the rotational output switching section 111b switches the setting of the output form of the rotational signal PG, the setting holding section 1111b holds the setting of the output form after the switching. Then, the rotation signal output section 115 converts the rotation position signal RP into the rotation signal PG so that the rotation signal PG has the output form held by the setting holding section 1111b. On the other hand, when the input of the power supply voltage Vcc to the motor control unit 11 is stopped or the input of the speed command signal Vsp to the motor control unit 11 is stopped, the setting holding unit 1111 resets the setting of the output form of the rotation signal PG.

Here, in modification 1, the rotation signal PG is a pulse wave. The output form of the rotation signal PG is represented by the number of pulses included in the rotation signal PG per 1 rotation of the motor M. Accordingly, the rotation output switching unit 111b changes the number of pulses included in the 1-rotation signal PG per rotation of the motor M. In modification 1, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are substituted for the power lines for changing the number of pulses included in the 1 st rotation signal PG of the motor M, whereby an increase in the number of power lines can be suppressed.

With continued reference to fig. 6, the setting switching unit 111 of the motor control unit 11 will be described. The setting switching section 111 further includes a rotation direction switching section 111a. The rotation direction switching unit 111a switches the setting of the rotation direction of the motor M. The rotation direction switching unit 111a is connected to the control signal line CL. The rotation direction switching unit 111a switches the setting of the rotation direction of the motor M in response to the control signal CS output from the power storage unit 15a of the two power storage units 15 to the control signal line CL.

Specifically, as described below, the setting of the rotation direction of the motor M is switched to the 1 st rotation direction.

That is, in a state where the power supply voltage Vcc is input to the motor control unit 11, when the control signal CS having a voltage value lower than the 1 st threshold TH1 is input to the rotation direction switching unit 111a, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 1 st rotation direction. Therefore, according to the 1 st modification, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are substituted for the power line for switching the setting of the rotation direction of the motor M to the 1 st rotation direction. As a result, the motor device B1 and the motor control device 1 can suppress an increase in the number of power lines for switching the setting of the rotation direction of the motor M.

More specifically, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 1 st rotation direction in the same procedure as when the setting switching unit 111 described with reference to fig. 2 switches the setting of the motor control unit 11 to the 1 st setting. Therefore, in modification 1, regarding the rotation direction switching unit 111a, in the description of fig. 2 in embodiment 1, the "setting switching unit 111" is referred to as "rotation direction switching unit 111a", and the "power storage unit 15" is referred to as "power storage unit 15a". The "setting and holding unit 1111" is referred to as "setting and holding unit 1111a", the "setting of the motor control unit 11" is referred to as "setting of the rotational direction of the motor M", and the "1 st setting" is referred to as "1 st rotational direction".

On the other hand, as shown below, the setting of the rotation direction of the motor M is switched to the 2 nd rotation direction.

That is, when the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is input to the rotation direction switching unit 111a in a state where the power supply voltage Vcc is input to the motor control unit 11, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 2 nd rotation direction. Therefore, according to the 1 st modification, the 1 st power line FL to which the power supply voltage Vcc is input and the 2 nd power line SL to which the speed command signal Vsp is input are substituted for the power line for switching the setting of the rotation direction of the motor M to the 2 nd rotation direction. As a result, the motor device B1 and the motor control device 1 can further suppress an increase in the number of power lines for switching the setting of the rotation direction of the motor M.

Specifically, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 2 nd rotation direction in the same procedure as when the setting switching unit 111 described with reference to fig. 3 and 5 switches the setting of the motor control unit 11 to the 2 nd setting.

Therefore, according to modification 1, the control signal CS is input to the rotation direction switching unit 111a in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. As a result, the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M to the 2 nd rotation direction in a state where the speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 is input to the rotation control unit 113. Thus, during the rotation of the motor M, the rotation direction of the motor M can be suppressed from being switched by the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH 1.

In modification 1, regarding the rotation direction switching unit 111a, in the description of fig. 3 and 5 in embodiment 1, the "setting switching unit 111" is referred to as "rotation direction switching unit 111a", and the "power storage unit 15" is referred to as "power storage unit 15a". The "setting and holding unit 1111" is referred to as "setting and holding unit 1111a", the "setting of the motor control unit 11" is referred to as "setting of the rotation direction of the motor M", and the "2 nd setting" is referred to as "2 nd rotation direction".

The rotation direction switching unit 111a includes a setting holding unit 1111a. The setting holding portion 1111a holds a setting of the rotation direction of the motor M. Specifically, when the rotation direction switching unit 111a switches the setting of the rotation direction of the motor M, the setting holding unit 1111a holds the setting of the rotation direction after the switching. The rotation control unit 113 controls the motor M via the inverter 13 so that the motor M rotates in the rotation direction held by the setting holding unit 1111a. On the other hand, when the input of the power supply voltage Vcc to the motor control unit 11 is stopped or the input of the speed command signal Vsp to the motor control unit 11 is stopped, the setting holding unit 1111b resets the setting of the rotation direction of the motor M.

(modification 2)

A modification 2 of embodiment 1 of the present invention will be described with reference to fig. 7. The motor system A1 according to modification 2 differs from modification 1 mainly in that modification 2 uses a single power storage unit 15 in common with a rotation direction switching unit 111a and a rotation output switching unit 111 b. Hereinafter, the differences between modification 2 and modification 1 will be mainly described.

Fig. 7 is a diagram showing a motor system A1 according to modification 2. As shown in fig. 7, the motor control device 1 according to modification 2 includes one power storage unit 15. The power storage unit 15 is connected to the 2 nd power line SL. Then, the 2 nd power line SL inputs the speed command signal Vsp to the power storage unit 15. As a result, the power storage unit 15 receives the speed command signal Vsp to store power. Further, the power storage unit 15 is connected to a control signal line CL. Power storage unit 15 is connected to both rotation direction switching unit 111a and rotation output switching unit 111b by control signal line CL. That is, power storage unit 15 is shared by rotation output switching unit 111b and rotation direction switching unit 111 a.

Therefore, according to modification 2, the motor control device 1 can be simplified as compared with the case where the power storage unit 15 is provided in each of the rotation direction switching unit 111a and the rotation output switching unit 111 b. As a result, the manufacturing cost of the motor control device 1 can be reduced. In modification 2, one power storage unit 15 functions as the power storage unit 15a and the power storage unit 15b of modification 1 described with reference to fig. 6.

(embodiment 2)

Embodiment 2 of the present invention will be described with reference to fig. 8 to 11. Embodiment 2 differs from embodiment 1 mainly in that the motor control unit 11 includes a power supply input switching unit 117 for switching between input and interruption of a power supply voltage Vcc in the motor system A1 of embodiment 2. Hereinafter, differences between embodiment 2 and embodiment 1 will be mainly described.

Fig. 8 is a diagram showing a motor system A1 according to embodiment 2. As shown in fig. 8, in the motor system A1 of embodiment 2, the motor control unit 11 of the motor control device 1 includes a power input switching unit 117 and an internal power line IL in addition to the configuration of the motor control unit 11 described with reference to fig. 1. The power input switching unit 117 is connected to the 1 st power line FL, the 2 nd power line SL, and the internal power line IL. The power input switching unit 117 is, for example, a power input switching circuit. The power supply input switching unit 117 switches between input and interruption of the power supply voltage Vcc to the inside of the motor control unit 11 according to the 2 nd threshold TH 2. The 2 nd threshold TH2 is smaller than the 1 st threshold TH1. The 1 st threshold TH1 is, for example, 2V, and the 2 nd threshold TH2 is, for example, 1V. The power input switching unit 117 outputs the power supply voltage Vcc to the internal power supply line IL, and inputs the power supply voltage Vcc to the motor control unit 11. The speed command signal Vsp is input from the 2 nd power line SL to the power input switching unit 117.

Specifically, in a state where the power supply voltage Vcc is input to the power supply input switching unit 117 from the 1 st power supply line FL, when the voltage value of the speed command signal Vsp is greater than the 2 nd threshold TH2, the power supply input switching unit 117 inputs the power supply voltage Vcc to the inside of the motor control unit 11 via the internal power supply line IL. Therefore, in a state where the power supply voltage Vcc is not input to the power supply input switching unit 117 from the 1 st power supply line FL, the power supply voltage Vcc is not input to the inside of the motor control unit 11.

On the other hand, in a state where the power supply voltage Vcc is input from the 1 st power supply line FL to the power supply input switching unit 117, when the voltage value of the speed command signal Vsp is equal to or less than the 2 nd threshold TH2, the power supply input switching unit 117 cuts off the input of the power supply voltage Vcc to the inside of the motor control unit 11.

Next, with reference to fig. 8 and 9, control when the setting of the motor control unit 11 is switched to the 1 st setting will be described. Fig. 9 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting to the motor control unit 11 is switched to the 1 st setting. In fig. 9, the potential of the 1 st power line FL, the potential of the internal power line IL, the potential of the 2 nd power line SL, and the potential of the control signal line CL are shown on the vertical axis. In addition, the horizontal axis represents time. In the description of fig. 9, the same operations and states as those of fig. 2 are appropriately omitted.

As shown in fig. 8 and 9, at time t1, the power supply voltage Vcc is input from the 1 st power supply line FL to the power supply input switching unit 117. Further, at time t1, since the speed command signal Vsp is not input to the 2 nd power line SL, the power supply input switching section 117 does not output the power supply voltage Vcc to the internal power line IL.

At a time t2 after the time t1, a speed command signal Vsp having a voltage value lower than the 1 st threshold TH1 and greater than the 2 nd threshold TH2 is input from the 2 nd power line SL to the power input switching unit 117. Accordingly, the power input switching unit 117 outputs the power supply voltage Vcc to the internal power supply line IL, and inputs the power supply voltage Vcc to the inside of the motor control unit 11. Further, power storage unit 15 inputs control signal CS having a voltage value lower than 1 st threshold TH1 and higher than 2 nd threshold TH2 to setting switching unit 111 via control signal line CL. As a result, the setting switching unit 111 switches the setting to the motor control unit 11 to the 1 st setting.

That is, in a state in which the power supply voltage Vcc is input from the internal power supply line IL to the inside of the motor control unit 11, when the control signal CS having a voltage value lower than the 1 st threshold TH1 and greater than the 2 nd threshold TH2 is input to the setting switching unit 111, the setting switching unit 111 switches the setting to the motor control unit 11 to the 1 st setting. As a result, the setting for the motor control unit 11 is determined, and the setting holding unit 1111 holds the 1 st setting.

As described above with reference to fig. 8 and 9, in embodiment 2, the setting of the motor control unit 11 can be switched to the 1 st setting according to the state changes of the power supply voltage Vcc and the speed command signal Vsp. That is, in embodiment 2, the 1 st power line FL and the 2 nd power line SL are replaced with power lines for switching the setting to the motor control unit 11 to the 1 st setting, as in embodiment 1. Therefore, the motor device B1 and the motor control device 1 can suppress an increase in the number of current-carrying lines for switching the setting to the motor control unit 11.

Next, control when the setting of the motor control unit 11 is switched to the 2 nd setting will be described with reference to fig. 8 and 10. Fig. 10 is a timing chart showing the power supply voltage Vcc, the speed command signal Vsp, and the control signal CS when the setting to the motor control unit 11 is switched to the 2 nd setting. In fig. 10, the potential of the 1 st power line FL, the potential of the internal power line IL, the potential of the 2 nd power line SL, and the potential of the control signal line CL are shown on the vertical axis. In addition, the horizontal axis represents time. In the description of fig. 10, the same operations and states as those of fig. 3 are appropriately omitted.

As shown in fig. 8 and 10, at time t3, the 1 st threshold TH1 or more speed command signal Vsp is input from the 2 nd power line SL to the motor control unit 11. Therefore, power storage unit 15 outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to setting switching unit 111 via control signal line CL. At time t3, power supply voltage Vcc is not input to 1 st power-on line FL. Therefore, the power supply voltage Vcc is not input into the motor control section 11.

At time t4 after time t3, the voltage value of the speed command signal Vsp of the 2 nd power line SL decreases below the 1 st threshold TH 1. The voltage value of the reduced speed command signal Vsp is greater than the 2 nd threshold TH2. Time t4 indicates when the voltage value of the speed command signal Vsp starts to decrease.

Meanwhile, from time t3 to time t4, power storage unit 15 stores power. Therefore, at time t4, when the voltage value of speed command signal Vsp decreases below 1 st threshold TH1, power storage unit 15 starts discharging to control signal line CL from time t 4. As a result, power storage unit 15 outputs control signal CS having a reduced voltage value to control signal line CL from time t 4. In this case, power storage unit 15 outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to control signal line CL for a time P or longer from time t 4.

At time t5, the power supply voltage Vcc is input from the 1 st power-on line FL to the power-supply-input switching unit 117. At time t5, a speed command signal Vsp having a voltage value greater than the 2 nd threshold TH2 is input from the 2 nd power line SL to the power input switching unit 117. Accordingly, the power input switching unit 117 outputs the power supply voltage Vcc to the internal power supply line IL, and inputs the power supply voltage Vcc to the inside of the motor control unit 11.

As a result, at time t5, in a state where power supply voltage Vcc is input into motor control unit 11, the voltage value of control signal CS output to control signal line CL is equal to or higher than 1 st threshold TH 1. Accordingly, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting. Then, at time t5, the setting for the motor control unit 11 is determined, and the setting holding unit 1111 holds the 2 nd setting.

As described above, in embodiment 2, the setting of the motor control unit 11 can be switched to the 2 nd setting based on the state change of the power supply voltage Vcc and the speed command signal Vsp, which is "the state in which the power supply voltage Vcc is not input to the inside of the motor control unit 11" →the state in which the 1 st threshold TH1 or more speed command signal Vsp is input "→the state in which the speed command signal Vsp is lowered to be lower than the 1 st threshold TH 1" →the state in which the power supply voltage Vcc is input to the inside of the motor control unit 11 ".

Specifically, in embodiment 2, in a state in which the power supply voltage Vcc is not input to the power supply input switching unit 117 from the 1 st power supply line FL, after the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 is input to the motor control unit 11, when the voltage value of the speed command signal Vsp is reduced to be lower than the 1 st threshold TH1, the power storage unit 15 outputs the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 to the setting switching unit 111 via the control signal line CL for a predetermined period of time P or longer.

Then, when the power supply voltage Vcc is input from the 1 st power line FL to the power supply input switching unit 117 and the voltage value of the speed command signal Vsp is greater than the 2 nd threshold TH2, the power supply input switching unit 117 inputs the power supply voltage Vcc to the inside of the motor control unit 11 via the internal power line IL.

Further, in a state where the power supply voltage Vcc is input from the internal power supply line IL to the inside of the motor control unit 11, when the control signal CS having a voltage value equal to or higher than the 1 st threshold TH1 is input to the setting switching unit 111, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting.

Therefore, in embodiment 2, when the motor control device 1 includes the power input switching unit 117 that operates according to the speed command signal Vsp, the setting of the motor control unit 11 can be easily switched by the control of the voltage value of the speed command signal Vsp based on two different thresholds (the 1 st threshold TH1 and the 2 nd threshold TH 2) and the control of the input timing of the speed command signal Vsp at different voltage values.

In embodiment 2, the 1 st power line FL and the 2 nd power line SL are replaced with power lines for switching the setting to the motor control unit 11 to the 2 nd setting, as in embodiment 1. Therefore, the motor device B1 and the motor control device 1 can further suppress an increase in the number of the energizing lines for switching the setting to the motor control unit 11. In embodiment 2, the same effects as those of embodiment 1 are obtained.

In embodiment 2, the motor control device 1 controls the power supply voltage Vcc at the time of switching the setting to the motor control unit 11 by controlling the power supply input switching unit 117 based on the speed command signal Vsp. Therefore, the configuration of the controller B2 can be simplified as compared with the case where the controller B2 alone is used to control the switching of the power supply voltage Vcc at the time of setting the motor control unit 11.

Next, with reference to fig. 8 and 11, the operation of the motor system A1 when the setting of the motor control unit 11 is switched to the 2 nd setting will be described. Fig. 11 is a flowchart showing the operation of the motor control device 1. As shown in fig. 11, the motor system A1 executes the processing of steps S1 to S18.

As shown in fig. 8 and 11, in step S11, the power supply unit 3 inputs the speed command signal Vsp having a voltage value equal to or higher than the 1 st threshold TH1 from the 2 nd power supply line SL to the motor control unit 11 in a state where the power supply voltage Vcc is not input from the 1 st power supply line FL to the power supply input switching unit 117.

In step S12, the power supply unit 3 reduces the voltage value of the speed command signal Vsp input to the motor control unit 11 below the 1 st threshold TH 1.

In step S13, power storage unit 15 continues for a predetermined time P or longer, and outputs control signal CS having a voltage value equal to or higher than 1 st threshold TH1 to setting switching unit 111.

In step S14, when the power supply voltage Vcc is not input to the power supply input switching section 117 or the speed command signal Vsp of a voltage value greater than the 2 nd threshold TH2 is not input to the power supply input switching section 117, the power supply input switching section 117 waits for the power supply voltage Vcc to be input and waits for the speed command signal Vsp of a voltage value greater than the 2 nd threshold TH2 to be input.

On the other hand, in step S14, when the power supply voltage Vcc is input to the power supply input switching section 117 and the speed command signal Vsp having a voltage value greater than the 2 nd threshold TH2 is input to the power supply input switching section 117, the process advances to step S15.

In step S15, the power supply input switching unit 117 inputs the power supply voltage Vcc into the motor control unit 11.

In step S16, the setting switching unit 111 determines whether or not the control signal CS having a voltage value equal to or greater than the 1 st threshold TH1 has been input.

If the determination in step S16 is negative, the process proceeds to step S11.

On the other hand, when the determination in step S16 is affirmative, the process advances to step S17. The "affirmative determination" indicates that the control signal CS determined to have a voltage value equal to or greater than the 1 st threshold TH1 has been input.

In step S17, the setting switching unit 111 switches the setting to the motor control unit 11 to the 2 nd setting.

In step S18, the rotation control unit 113 controls the rotation speed of the motor M based on the speed command signal Vsp.

As described above with reference to fig. 11, according to embodiment 2, the setting of the motor control unit 11 can be switched to the 2 nd setting by controlling the input timing of the power supply voltage Vcc and the speed command signal Vsp. Therefore, in the motor system A1, an increase in the number of current-carrying lines for switching the setting to the motor control unit 11 can be suppressed.

In the 1 st modification and the 2 nd modification of embodiment 1 described with reference to fig. 6 and 7, the motor control unit 11 may further include the power input switching unit 117 of embodiment 2.

For example, in modification 1, when the motor control unit 11 includes the power input switching unit 117, the description of embodiment 2 will be modified as follows.

That is, in the description of fig. 9 to 11 in embodiment 2, the "setting switching unit 111" is referred to as "rotation output switching unit 111b", and the "power storage unit 15" is referred to as "power storage unit 15b". The "setting and holding unit 1111" is referred to as "setting and holding unit 1111b", and the "setting of the motor control unit 11" is referred to as "setting of the output form of the rotation signal PG".

In addition, the rotation output switching unit 111b changes the "1 st setting" to the "1 st output form" in the description of fig. 9 in embodiment 2, and changes the "2 nd setting" to the "2 nd output form" in the descriptions of fig. 10 and 11 in embodiment 2.

On the other hand, in the description of fig. 9 to 11 in embodiment 2, the "setting switching unit 111" is referred to as "rotation direction switching unit 111a", and the "power storage unit 15" is referred to as "power storage unit 15a". The "setting and holding unit 1111" is referred to as "setting and holding unit 1111a", and the "setting of the motor control unit 11" is referred to as "setting of the rotation direction of the motor M".

In addition, regarding the rotation direction switching unit 111a, in the description of fig. 9 in embodiment 2, "1 st setting" is changed to "1 st rotation direction", and in the description of fig. 10 and 11 in embodiment 2, "2 nd setting" is changed to "2 nd rotation direction".

In addition, for example, in modification 2, when the motor control unit 11 includes the power input switching unit 117, one of the power storage units 15 functions as the power storage unit 15a and the power storage unit 15b when the motor control unit 11 includes the power input switching unit 117 in modification 1.

Here, in embodiment 1, 1 st modification, 2 nd modification, and embodiment 2, the motor control unit 11 may be constituted by one IC, for example, and the motor control unit 11 and the inverter 13 may be constituted by one IC, for example. In embodiment 1, 1 st modification, 2 nd modification, and embodiment 2, the power storage unit 15 is disposed outside the motor control unit 11. However, the power storage unit 15 may be disposed inside the motor control unit 11, and the disposition of the power storage unit 15 is not particularly limited.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various modes within a range not departing from the gist thereof. In addition, a plurality of constituent elements disclosed in the above embodiment may be appropriately changed. For example, some of all the components shown in a certain embodiment may be added to the components of another embodiment, or some of all the components shown in a certain embodiment may be deleted from the embodiment.

The drawings are schematically shown mainly for each component for easy understanding of the invention, and the thickness, length, number, interval, and the like of each component shown in the drawings may be different from those in practice for convenience in manufacturing the drawings. The configuration of each component shown in the above-described embodiment is an example, and is not particularly limited, and various modifications are possible without departing from the scope of the present invention.

Industrial applicability

The invention provides a motor control device and a motor device, which have industrial applicability.

Claims (9)

1. A motor control device is provided with:

a motor control unit that controls a motor;

a 1 st power line for inputting a power supply voltage to the motor control unit;

a 2 nd power line for inputting a speed command signal for controlling the rotational speed of the motor to the motor control unit; and

a power storage unit connected to the 2 nd power line, for receiving the speed command signal and storing power,

the motor control unit includes:

a rotation control unit that controls a rotation speed of the motor based on the speed command signal when the speed command signal is input in a state where the power supply voltage is input to the motor control unit; and

A setting switching unit for switching the setting of the motor control unit,

when the voltage value of the speed command signal is reduced below the 1 st threshold value after the speed command signal having a voltage value equal to or higher than the 1 st threshold value is input to the motor control unit in a state where the power supply voltage is not input to the motor control unit, the power storage unit continues for a predetermined time or longer and outputs a control signal having a voltage value equal to or higher than the 1 st threshold value to the setting switching unit,

after the voltage value of the speed command signal is lowered below the 1 st threshold, the power supply voltage is input to the motor control section,

the setting switching unit switches the setting of the motor control unit when the control signal having the voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit.

2. The motor control device according to claim 1, wherein,

when the input of the power supply voltage to the motor control section is stopped, the setting switching section resets the setting to the motor control section,

after the setting of the motor control unit is reset, the speed command signal having a voltage value equal to or higher than the 1 st threshold value is input to the motor control unit in a state in which the power supply voltage is not input to the motor control unit, and then, when the voltage value of the speed command signal decreases below the 1 st threshold value, the power storage unit continues for the fixed time or longer and outputs the control signal having a voltage value equal to or higher than the 1 st threshold value to the setting switching unit.

3. The motor control device according to claim 1, wherein,

the setting of the motor control unit indicates a setting of a rotation direction of the motor,

the setting switching part is provided with a rotation direction switching part for switching the setting of the rotation direction of the motor,

the rotation direction switching unit switches setting of a rotation direction of the motor when the control signal having a voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit.

4. The motor control device according to claim 1, wherein,

the motor control device further includes a rotational position detecting unit that detects a rotational position of a rotor of the motor,

the motor control unit further includes a rotation signal output unit that converts a rotation position signal indicating the rotation position detected by the rotation position detection unit into a rotation signal indicating the rotation speed of the motor and outputs the rotation signal,

the setting of the motor control unit indicates a setting of an output form of the rotation signal,

the setting switching unit has a rotation output switching unit that switches setting of the output form of the rotation signal,

When the control signal having a voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit, the rotation output switching unit switches the setting of the output form of the rotation signal.

5. The motor control device according to claim 4, wherein,

the rotation signal is a pulse wave and,

the output form of the rotation signal is represented by the number of pulses contained in the rotation signal per 1 revolution of the motor.

6. The motor control device according to claim 1, wherein,

the motor control device further includes a rotational position detecting unit that detects a rotational position of a rotor of the motor,

the motor control unit further includes a rotation signal output unit that converts a rotation position signal indicating the rotation position detected by the rotation position detection unit into a rotation signal indicating the rotation speed of the motor and outputs the rotation signal,

the setting of the motor control unit indicates a setting of an output form of the rotation signal and a setting of a rotation direction of the motor,

The setting switching unit includes:

a rotation output switching unit that switches setting of the output form of the rotation signal; and

a rotation direction switching unit that switches a setting of a rotation direction of the motor,

when the control signal having a voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit, the rotation output switching unit switches the setting of the output form of the rotation signal,

when the control signal having a voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit, the rotation direction switching unit switches the setting of the rotation direction of the motor,

the power storage unit is shared by the rotation output switching unit and the rotation direction switching unit.

7. The motor control device according to claim 1, wherein,

the motor control unit further includes a power input switching unit that switches input and shut-off of the power supply voltage to and from the inside of the motor control unit according to a 2 nd threshold value smaller than the 1 st threshold value,

in a state where the power supply voltage is input to the power supply input switching section, in a case where a voltage value of the speed command signal is greater than the 2 nd threshold value, the power supply input switching section inputs the power supply voltage to the inside of the motor control section,

When the voltage value of the speed command signal is equal to or less than the 2 nd threshold value in a state where the power supply voltage is input to the power supply input switching unit, the power supply input switching unit cuts off the input of the power supply voltage to the inside of the motor control unit,

in a state where the power supply voltage is not input to the power supply input switching section, the power supply voltage is not input to the inside of the motor control section,

when the voltage value of the speed command signal is reduced below the 1 st threshold after the speed command signal having the voltage value of the 1 st threshold or more is input to the motor control unit in a state in which the power supply voltage is not input to the power supply input switching unit, the power storage unit outputs the control signal having the voltage value of the 1 st threshold or more to the setting switching unit for the predetermined time or more,

in the case where the power supply voltage is input to the power supply input switching section and the voltage value of the speed command signal is greater than the 2 nd threshold value, the power supply input switching section inputs the power supply voltage to the inside of the motor control section,

The setting switching unit switches the setting of the motor control unit when the control signal having the voltage value equal to or higher than the 1 st threshold is input in a state where the power supply voltage is input to the motor control unit.

8. The motor control device according to claim 1, wherein,

the power storage unit includes a diode and a capacitor.

9. A motor device is provided with:

the motor control device according to any one of claims 1 to 8; and

the motor.

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