KR20140121224A - Motor driving device, and method for cotrolling motor - Google Patents

Motor driving device, and method for cotrolling motor Download PDF

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Publication number
KR20140121224A
KR20140121224A KR20130037735A KR20130037735A KR20140121224A KR 20140121224 A KR20140121224 A KR 20140121224A KR 20130037735 A KR20130037735 A KR 20130037735A KR 20130037735 A KR20130037735 A KR 20130037735A KR 20140121224 A KR20140121224 A KR 20140121224A
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KR
South Korea
Prior art keywords
current
motor
drive
comparator
driving
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KR20130037735A
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Korean (ko)
Inventor
남중진
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삼성전기주식회사
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Priority to KR20130037735A priority Critical patent/KR20140121224A/en
Publication of KR20140121224A publication Critical patent/KR20140121224A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2203/00—Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor
    • H02P2203/03—Determination of the rotor position, e.g. initial rotor position, during standstill or low speed operation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The present invention relates to a motor driving control device and method, and a motor system using the same. The motor driving control device according to an embodiment of the present invention comprises a control unit which generates a control signal to an operation of a motor device; a driving control unit which generates a driving signal to drive the motor device, using positional information of a rotor or the control signal; an inverter unit which drives the motor device by supplying driving current to the motor device according to the driving signal; and a current detecting unit which detects a peak current or an overload current generated from the driving current.

Description

TECHNICAL FIELD [0001] The present invention relates to a motor drive control apparatus and method, and a motor system using the same. BACKGROUND OF THE INVENTION [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor drive control technique, and more particularly, to a motor drive control device and method capable of managing an overcurrent or a peak current by using a drive current of the motor device, and a motor system using the same.

In recent years, there has been an increasing demand for electric devices or electronic devices for individuals, homes, offices, and the like. Such a device may employ a driving circuit for driving a specific operation in the inside, for example, a motor device.

A motor drive control device is used to control the driving of the motor device.

Such a motor drive control device is required to sense a current due to the driving of the motor device to sense an overcurrent state and perform appropriate operation control.

In the conventional motor drive control technology, control is performed based on a process of analog-to-digital conversion of the detected current. For example, a method of digitally converting a sensed current and detecting an overload current or a peak current using a control processor is mainly used.

However, in this conventional method, an analog-to-digital conversion process is indispensable, and there is a limitation that an exception process for a current is performed only through a control processor. As a result, there arises a problem that a delay occurs in the control operation, thereby making it difficult to protect the circuit. Further, there is a problem that the configuration of the motor drive control device is complicated and the unit price is increased.

The following Patent Document 1 relates to a motor drive control technique, but does not provide a solution to the above-mentioned problem.

Korean Patent Publication No. 2009-0006013

SUMMARY OF THE INVENTION The present invention provides a motor drive control apparatus and method capable of detecting a peak current or an overload current with respect to a drive current of a motor apparatus with a simpler configuration, and a motor system using the same.

A first technical aspect of the present invention proposes a motor drive control device. The motor drive control device includes a control unit for generating a control signal for controlling the operation of the motor device, a drive control unit for generating a drive signal for driving the motor device using the position information of the rotor or the control signal, An inverter unit for supplying a driving current to the motor device according to the driving signal to drive the motor device, and a current detector for detecting a peak current or an overload current in the driving current do.

In one embodiment, the current detector receives a current sensor for sensing the driving current and a predetermined peak threshold and the driving current, and outputs a high value if the driving current is greater than the peak threshold value And a first comparator for providing the control signal to the drive control unit.

In one embodiment, the current detector includes a second comparator that receives a predetermined overload peak value and the drive current, and outputs a high value to the controller when the drive current is greater than the overload threshold value .

In one embodiment, the drive control unit receives the output of the first comparator and may generate the drive signal to stop the operation of the motor device when the output of the first comparator is high.

In one embodiment, the drive control unit includes: a plurality of gate drivers for respectively controlling a plurality of pairs of power switching elements included in the inverter unit; and a control unit for controlling the plurality of pairs of power switching And a gate controller for controlling the plurality of gate drivers to drive the elements separately from each other.

In one embodiment, the gate controller receives the output of the first comparator and, if the output value of the first comparator is high, controls the plurality of gate drivers to stop driving the plurality of power switching elements have.

In one embodiment, the controller receives the output of the second comparator, and determines that the output of the second comparator is overloaded if the output of the second comparator is high for more than a predetermined time.

A second technical aspect of the present invention proposes a motor system. The motor system includes a motor device that rotates using a driving current input from the outside, and a controller that senses generation of a peak current or an overload current in the driving current, and detects a peak current or an overload current according to the operation of the motor device And a motor drive control device for controlling the motor.

In one embodiment, the motor drive control device includes a control unit for generating a control signal for controlling the operation of the motor device, a drive signal for driving the motor device using the position information of the rotor or the control signal, An inverter unit for supplying a driving current to the motor device in accordance with the driving signal to drive the motor device; and a controller for, when a peak current or an overload current occurs in the driving current, And a current detector for detecting the current.

In one embodiment, the current detector includes a current sensor for sensing the driving current, a predetermined peak threshold value and the driving current, and outputs a high value if the driving current is greater than the peak threshold value A second comparator for receiving a driving current and a first comparator for providing a predetermined overload peak value and a driving current to the driving control unit and outputting a high value to the control unit when the driving current is greater than the overload threshold value, .

In one embodiment, the drive control unit includes: a plurality of gate drivers for respectively controlling a plurality of pairs of power switching elements included in the inverter unit; and a control unit for controlling the plurality of pairs of power switching And a gate controller for controlling the plurality of gate drivers to drive the elements separately from each other.

In one embodiment, the gate controller receives the output of the first comparator and, if the output value of the first comparator is high, controls the plurality of gate drivers to stop driving the plurality of power switching elements have.

In one embodiment, the controller receives the output of the second comparator, and may determine that the overload state is present if the output value of the second comparator is high for a predetermined time or more.

A third technical aspect of the present invention proposes a motor drive control method. The motor drive control method is performed in a motor drive control device that controls drive of the motor device by using a drive current of the motor device. The motor drive control method comprising: a detection step of detecting a drive current of the motor device; a step of comparing the detected drive current with a predetermined peak threshold value, and if the detected drive current is greater than a peak threshold value, And controlling the motor device to stop if the detected drive current is greater than a predetermined time longer than the overload threshold value, .

In one embodiment, the peak management step may include inputting the predetermined peak threshold value and the drive current to a first comparator, and outputting the drive current to the motor device using a gate driver if the output value of the first comparator is high. And stopping the operation.

In one embodiment, the overload management step may include inputting the predetermined overload threshold value and the drive current to a second comparator, and if the output value of the second comparator has a high value over the predetermined time, And controlling the operation of the motor device to be stopped by using the control signal.

According to the present invention, it is possible to detect a peak current or an overload current with a relatively simple structure, thereby preventing circuit damage due to an overcurrent detection delay and effectively lowering the unit cost of the device.

1 is a block diagram for explaining an embodiment of a motor system according to the present invention.
2 is a block diagram for explaining an embodiment of the motor drive control device 100 of FIG.
3 is a block diagram for explaining an embodiment of the drive control unit and the interverter unit of FIG.
4 is a flowchart for explaining an embodiment of a motor drive control method according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

In the drawings referred to in the present invention, elements having substantially the same configuration and function will be denoted by the same reference numerals, and the shapes and sizes of the elements and the like in the drawings may be exaggerated for clarity.

Hereinafter, the motor device refers to a device that performs rotational operation using external input power, and the motor drive control device refers to a device that controls the driving of the motor device. It is also referred to as a motor system including a motor device and a motor drive control device. Here, the motor device and the motor drive control device are logically separate components, but may also be implemented as one object according to an embodiment.

1 is a block diagram for explaining an embodiment of a motor system according to the present invention.

As shown in FIG. 1, the motor system includes a motor drive control device 100 and a motor device 200.

The motor device 200 can rotate using the drive current input from the motor drive control device 100. [

The motor drive control apparatus 100 senses generation of a peak current or an overload current in the drive current supplied to the motor device 200 and controls the operation of the motor device according to the occurrence of the peak current or the overload current have.

The motor drive control device 100 includes a control unit 110, a drive control unit 120, an inverter unit 130, and a current detection unit 140.

The control unit 110 may generate a control signal for controlling the operation of the motor device 200. [ For example, the controller 110 may be implemented as a processor such as an MCU (Micro Controller Unit) or a DSP (Digital Signal Processor). Here, the control signal may be a pulse width modulated signal.

The drive control unit 120 may generate a drive signal for driving the motor device 200 using the position information or the control signal of the rotor. Here, the position information of the rotor can be obtained by various means. For example, the position information of the rotor may be generated by a Hall sensor (not shown). For another example, the position information of the rotor may be generated by detecting the back electromotive force.

The inverter unit 130 can drive the motor device 200 by supplying a driving current to the motor device 200 according to the driving signal. The inverter unit 130 may include a predetermined power switching device.

The current detector 140 can detect peak current (Peak Current) or overload current (Overload Current) in the driving current.

Each of the components of the motor drive control device 100 will be described in detail below with reference to Figs. 2 to 3. Fig.

2 is a block diagram for explaining an embodiment of the motor drive control device 100 of FIG.

Referring to FIG. 2, the current detector 140 may include a current sensor 141, a first comparator 142, and a second comparator 143.

The current sensor 141 can sense the driving current. The current sensor 141 is electrically connected to the inverter unit 130 and the motor device 200 to sense a driving current. Or may be connected to the motor device 200 to sense the driving current. The current sensor 141 may be composed of various sensing means, for example, a sensing resistor.

The first comparator 142 may be implemented as a comparator element, and may receive a predetermined peak threshold and a driving current output from the current sensor. The first comparator 142 compares the peak current with the drive current and may output a high value if the drive current is greater than the peak threshold. Here, the peak threshold value is a threshold value of the peak current judged as an overcurrent. Therefore, when the driving current exceeding the peak threshold value is detected, the control operation for stopping the driving of the motor device 200 is performed.

The output (first signal) of the first comparator 142 may be provided to the drive control unit 120. That is, conventionally, since the determination and processing of the peak threshold value is performed by the control unit 110, detection and corresponding control of the actual peak current is limited. The present invention can quickly determine the peak current using the first comparator 142. [ The drive control unit 120 controls the drive unit 120 to stop driving the motor unit 200 quickly in the case of a peak current so that it can quickly respond to the peak current Control is possible.

Accordingly, the drive control unit 120 can generate the drive signal to stop the operation of the motor device 200 when the output of the first comparator 142 is high.

The second comparator 143 may be implemented as a comparator element, and may receive a predetermined overload peak value and a driving current. The second comparator 143 may output a high value as a second signal to the controller 110 if the driving current is greater than the overload threshold value.

If the input second signal maintains a high value for a predetermined time or more, the control unit 110 determines that the second signal is in an overload state and stops the driving of the motor device 200 or decreases the driving speed of the motor device 200 The control signal can be generated.

FIG. 3 is a configuration diagram for explaining an embodiment of the drive control unit and the interverter unit of FIG. 1;

Referring to FIG. 3, the drive control unit 120 may include a gate controller 121 and a plurality of gate drivers 122 to 124.

The gate controller 121 can control the plurality of gate drivers 122 to 124. [

The gate controller 121 can control the plurality of gate drivers to individually drive the plurality of pairs of power switching elements based on the position information LS of the rotor and the control signal PWM. As shown in the example, the three-phase motor will be described. The gate controller 121 confirms the relative position between the magnetic pole of the rotor and the core on the stator angle, identifies the energization period of each phase, And generate and provide signals HIN and LIN for controlling the gate drivers 122 to 124 corresponding to the respective phases.

In one embodiment, the gate controller 121 may receive further input S1 of the first comparator 142. When the value of the output S1 of the first comparator is high, the gate controller 121 outputs a plurality of pairs of power switching elements, regardless of the value of the position information LS of the input rotor and the value of the control signal PWM It is possible to control the plurality of gate drivers 122 to 124 to stop driving. That is, when the peak current exceeding the peak threshold value is detected, the driving of the motor device 200 can be stopped quickly without going through the control unit 110. [

The gate drivers 122 to 124 can control the plurality of pairs of power switching elements included in the inverter unit 130, respectively.

The inverter unit 130 has a pair of power switching elements corresponding to each phase of the motor device 200. [ (FET1, FET4), (FET2, FET5) and (FET3, FET6) are three pairs corresponding to the three phases of the motor device 200, respectively. Therefore, three gate drivers 122 to 124 are also provided to generate and provide the driving signals HO and LO for each pair of power switching elements.

4 is a flowchart for explaining an embodiment of a motor drive control method according to the present invention.

The embodiment of the motor drive control method to be described with reference to Fig. 4 is performed in the motor drive control device described above with reference to Figs. 1 to 3, and therefore, the same as the above description with reference to Figs. 1 to 3, The corresponding content will not be duplicated again in the following.

Referring to Fig. 4, the motor drive control device 100 can detect the drive current of the motor device (S410).

Then, the motor drive control device 100 compares the detected drive current with a predetermined peak threshold value, and if the detected drive current is greater than the peak threshold value (YES in S420), the motor drive control device 100 controls the motor device 200 to stop (S440) to perform the peak management step.

Alternatively, the motor drive control device 100 compares the detected drive current with a predetermined overload threshold value, and if the detected drive current is greater than the overload threshold by a predetermined time (S430, YES) (S440) so as to perform the overload management step.

In the illustrated example, it is described that the overload management step is performed after the peak management step. However, it is for convenience of explanation that it is obvious that the peak management step and the overload management step may be performed independently of each other or in parallel .

In one embodiment of the peak management step, the motor drive control device 100 may input the peak current threshold value and the drive current preset in the first comparator 142. [ Thereafter, when the output value of the first comparator 142 is high, the motor drive control device 100 can control to stop the operation of the motor device 200 by using the gate drivers 122 to 124. [

In one embodiment of the overload management step, the motor drive control device 100 may input a predetermined overload threshold value and a drive current to the second comparator 143. [ Thereafter, when the output value of the second comparator 143 has a high value for a predetermined time or longer, the motor drive control apparatus 100 can control to stop the operation of the motor device 200 using the control unit 110 have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

100: Motor drive control device
110:
120:
121: gate controller
122, 123, 124: gate driver
130:
140:
141: Current sensor
142: first comparator
143: second comparator
200: Motor device

Claims (16)

A control unit for generating a control signal for controlling the operation of the motor device;
A drive control unit for generating a drive signal for driving the motor device using position information of the rotor or the control signal;
An inverter unit for supplying a driving current to the motor device according to the driving signal to drive the motor device; And
A current detector for detecting a peak current or an overload current in the driving current when the peak current or the overload current occurs; And the motor drive control device.
The apparatus of claim 1, wherein the current detector
A current sensor for sensing the driving current; And
A first comparator receiving a predetermined peak threshold value and the driving current and outputting a high value to the driving control unit if the driving current is greater than the peak threshold value; And the motor drive control device.
The apparatus as claimed in claim 2, wherein the current detector
A second comparator that receives a predetermined overload peak value and the drive current, and outputs a high value to the control unit if the drive current is greater than the overload threshold value; Further comprising:
3. The apparatus of claim 2, wherein the drive control unit
And generates the drive signal to stop the operation of the motor device when the output of the first comparator is high and the output of the first comparator is high.
3. The apparatus of claim 2, wherein the drive control unit
A plurality of gate drivers for respectively controlling a plurality of pairs of power switching elements included in the inverter section; And
A gate controller for controlling the plurality of gate drivers to individually drive the plurality of pairs of power switching elements based on the position information of the rotor and the control signal; And the motor drive control device.
6. The apparatus of claim 5, wherein the gate controller
And controls the plurality of gate drivers to stop driving the plurality of power switching elements when the output of the first comparator is high and the output value of the first comparator is high.
4. The apparatus of claim 3, wherein the control unit
When the output of the second comparator is high and the time when the output of the second comparator is high is equal to or longer than a predetermined time, the overload state is determined.
A motor device that rotates using an externally input drive current; And
And a motor drive control device for detecting generation of a peak current or an overload current in the drive current and controlling operation of the motor device in accordance with generation of the peak current or the overload current.
The motor drive control device according to claim 8, wherein the motor drive control device
A control unit for generating a control signal for controlling the operation of the motor device;
A drive control unit for generating a drive signal for driving the motor device using position information of the rotor or the control signal;
An inverter unit for supplying a driving current to the motor device according to the driving signal to drive the motor device; And
A current detector for detecting a peak current or an overload current in the driving current when the peak current or the overload current occurs; ≪ / RTI >
The apparatus as claimed in claim 9, wherein the current detector
A current sensor for sensing the driving current;
A first comparator receiving a predetermined peak threshold value and the driving current and outputting a high value to the driving control unit if the driving current is greater than the peak threshold value; And
A second comparator that receives a predetermined overload peak value and the drive current, and outputs a high value to the control unit if the drive current is greater than the overload threshold value; ≪ / RTI >
11. The apparatus of claim 10, wherein the drive control unit
A plurality of gate drivers for respectively controlling a plurality of pairs of power switching elements included in the inverter section; And
A gate controller for controlling the plurality of gate drivers to individually drive the plurality of pairs of power switching elements based on the position information of the rotor and the control signal; ≪ / RTI >
12. The apparatus of claim 11, wherein the gate controller
And receives the output of the first comparator and controls the plurality of gate drivers to stop driving the plurality of pairs of power switching elements when the output value of the first comparator is high.
11. The apparatus of claim 10, wherein the control unit
When the output of the second comparator is high and the time when the output of the second comparator is high is equal to or longer than a predetermined time.
A motor drive control method performed in a motor drive control apparatus for controlling the drive of the motor apparatus using a drive current of the motor apparatus,
A detecting step of detecting a driving current of the motor device;
A peak management step of comparing the detected drive current with a predetermined peak threshold value and controlling the motor device to stop if the detected drive current is greater than a peak threshold value; And
An overload management step of comparing the detected drive current with a predetermined overload threshold value and stopping the motor device if the detected drive current is greater than a predetermined overload threshold value by more than a predetermined time; And the motor drive control method.
15. The method of claim 14, wherein the peak management step
Inputting the predetermined peak threshold value and the drive current into a first comparator; And
Controlling the operation of the motor device to stop using the gate driver when the output value of the first comparator is high; And the motor drive control method.
15. The method of claim 14, wherein the overload management step
Inputting the predetermined overload threshold value and the drive current into a second comparator; And
Controlling the operation of the motor device to stop using the control unit if the output value of the second comparator has a value higher than the preset time; And the motor drive control method.
KR20130037735A 2013-04-05 2013-04-05 Motor driving device, and method for cotrolling motor KR20140121224A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104698380A (en) * 2015-02-11 2015-06-10 昆山华誉自动化科技有限公司 Comprehensive testing system of automobile motor
CN107565763A (en) * 2016-06-29 2018-01-09 建准电机工业股份有限公司 Motor, motor power control method and fan with motor
CN108880342A (en) * 2017-05-09 2018-11-23 晶宏半导体股份有限公司 Three-phase direct-current brushless motor control system
WO2021194943A1 (en) * 2020-03-27 2021-09-30 La-Z-Boy Incorporated Furniture motion control system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104698380A (en) * 2015-02-11 2015-06-10 昆山华誉自动化科技有限公司 Comprehensive testing system of automobile motor
CN107565763A (en) * 2016-06-29 2018-01-09 建准电机工业股份有限公司 Motor, motor power control method and fan with motor
CN108880342A (en) * 2017-05-09 2018-11-23 晶宏半导体股份有限公司 Three-phase direct-current brushless motor control system
WO2021194943A1 (en) * 2020-03-27 2021-09-30 La-Z-Boy Incorporated Furniture motion control system
GB2607773A (en) * 2020-03-27 2022-12-14 La Z Boy Inc Furniture motion control system
US11844432B2 (en) 2020-03-27 2023-12-19 La-Z-Boy Incorporated Furniture motion control system

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