CN103095208B - Motor drive - Google Patents
Motor drive Download PDFInfo
- Publication number
- CN103095208B CN103095208B CN201210441173.8A CN201210441173A CN103095208B CN 103095208 B CN103095208 B CN 103095208B CN 201210441173 A CN201210441173 A CN 201210441173A CN 103095208 B CN103095208 B CN 103095208B
- Authority
- CN
- China
- Prior art keywords
- power supply
- mentioned
- motor drive
- voltage
- power source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a kind of motor drive, possess: inverter, it is transfused to the voltage from controlling power supply, provides electric power with the driving winding from main power source to motor; And control part, control power supply is produced the power on signal to inverter by it as electric power source, wherein, circuit protecting element is arranged at control power and provides line, and this circuit protecting element is protecting control power supply when controlling the load short circuits of power supply.
Description
Technical field
The present invention relates to a kind of motor drive being used in the air blasts such as aircondition, particularly relate to a kind of preventing and be destroyed by motor drive and make fault feed through to the technology of higher level equipment.
Background technology
In the past, as the motor drive of air blast being used in aircondition, known following motor drive: be provided as from outside to the DC power supply of the electric power source of the winding of motor, as to the control power supply of the electric power source of each parts of the inscape of drive unit and to the operation instruction of motor to play function, the rotating signal of motor is outputted to outside (for example, referring to patent documentation 1).
Figure 15 is the overall structure figure of the past case of motor drive.This motor drive in the past prevents diode D1 ~ D3 by control circuit 104, power switch component 105, adverse current, has motor driven winding L 1 ~ L3, the motor of rotor 109, high-voltage dc power supply 101, control power supply 102 and speed control unit 103 is formed.The voltage VDC exported from high-voltage dc power supply 101 (high voltage) is inputted to power switch component 105.Inputting to control circuit 104 prevents diode D1 from controlling power supply 102 (low-voltage) the voltage VCC that exports with the operation-command signal VSP being prevented diode D2 by adverse current and export from speed control unit 103 (low-voltage) by adverse current.In addition, control circuit 104 is configured to the rate signal FG of motor to prevent diode D3 from outputting to speed control unit 103 (low-voltage) by adverse current.
Figure 16 illustrates and causes high-tension high-voltage dc power supply to export the situation that there occurs short circuit between the control power supply (VCC) of (VDC) and low-voltage and speed control unit by motor drive circuit 106 is destroyed etc. in this motor drive in the past.As shown in figure 16, adverse current prevents diode D1 ~ D3 to be configured to be connected with high voltage VDC and control voltage VCC when there occurs this short circuit and to make high voltage VDC be negative electrode K side.At this, when being short-circuited between motor drive circuit 106 builtin voltage VDC and voltage VCC, as shown in figure 16, prevent diode D1 from applying high voltage VDC to control power supply 102 and adverse current.But owing to preventing the negative electrode K side of diode D1 from applying high voltage VDC to adverse current, therefore adverse current prevents diode D1 to be in nonconducting state, and high voltage VDC can not be applied to and control power supply 102.
In this motor drive in the past, do not prevent diode D1 from applying high voltage VDC to control power supply 102 by adverse current, but when significantly declining as the impedance of the control power input terminal of the control circuit 104 of the load of control power supply 102 due to destroyed grade, become excessive from the fault current controlling power supply 102.And, control power supply 102 and must continue to export excessive electric current, therefore there is the problem of the inscape of possibility destruct limit power supply 102.
The object of the invention is to, prevent the load controlling power supply because motor drive circuit is destroyed from becoming Low ESR thus produce excessive fault current, cause controlling the situation of power failure.
Patent documentation 1: Japanese Unexamined Patent Publication 2007-110867 publication
Summary of the invention
The feature of motor drive of the present invention is to possess: inverter, and it is transfused to the voltage from controlling power supply, to provide electric power from main power source to motor driven winding; And control part, control power supply is produced the power on signal to inverter by it as electric power source, wherein, circuit protecting element is arranged at control power and provides line, and this circuit protecting element is protecting control power supply when controlling the load short circuits of power supply.
In addition, the feature of motor drive of the present invention is to possess: main power source, and commercial ac power source is carried out the direct voltage that rectification smoothly obtains by its output; And control power supply, its lead-out terminal possesses transistor, exports the voltage of the voltage lower than main power source obtained from main power source by voltage conversion unit.Also possess: inverter, it is transfused to from controlling the voltage of power supply as function action power supply, to provide electric power from main power source to motor driven winding; And control part, control power supply is produced the power on signal to inverter by it as electric power source.And in motor drive of the present invention, the first resistance is arranged at provides line, the fault current produced when any one restriction in inverter and control part of this first resistance is short-circuited from controlling the electric power of power supply to inverter.
Motor drive of the present invention can provide on line in the control power from control power supply and arrange circuit protecting element, the first resistance; thus when inverter and control part are short-circuited fault by circuit protecting element disengagement failure electric current, make destruction to feed through to higher level equipment.
Accompanying drawing explanation
Fig. 1 is the structure chart of the motor drive of embodiments of the present invention 1.
Fig. 2 is the action specification figure of the motor drive of embodiments of the present invention 1.
Fig. 3 is the structure chart of the motor drive of embodiments of the present invention 2.
Fig. 4 is the action specification figure of the motor drive of embodiments of the present invention 2.
Fig. 5 is the structure chart of the motor drive of embodiments of the present invention 3.
Fig. 6 is the action specification figure of the motor drive of embodiments of the present invention 3.
Fig. 7 is the structure chart of the motor drive of embodiments of the present invention 4.
Fig. 8 is the action specification figure of the motor drive of embodiments of the present invention 4.
Fig. 9 is the structure chart of the motor drive of embodiments of the present invention 5.
Figure 10 is the action specification figure of the motor drive of embodiments of the present invention 5.
Figure 11 is the structure chart of the motor drive of embodiments of the present invention 6.
Figure 12 is the action specification figure of the motor drive of embodiments of the present invention 6.
Figure 13 is the structure chart of the motor drive of embodiments of the present invention 7.
Figure 14 is the action specification figure of the motor drive of embodiments of the present invention 7.
Figure 15 is the overall structure figure of motor drive in the past.
Figure 16 is the action specification figure of motor drive in the past.
Embodiment
(execution mode 1)
Fig. 1 is the structure chart of the motor drive of embodiments of the present invention 1.As shown in Figure 1, this motor drive possesses motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1 and as providing the main power source 4 of the power supply of direct current power to motor drive circuit 1 and controlling power supply 5.In addition, in the present embodiment, enumerate motor drive and possess microcomputer 6 to control an example of motor drive circuit 1.In addition, this motor drive drive motor rotates, and above-mentioned electric tools is standby has installed motor driven winding L
1, L
2, L
3stator (not shown) and be configured to opposite with this stator and rotate rotor (not shown) freely.
Motor drive circuit 1 is primary structure key element with inverter 2 and control part 3, the lead-out terminal of this inverter 2 and motor driven winding L
1, L
2, L
3connect, this control part 3 produces PWM (pulse width modulation) signal as power on signal and is supplied to inverter 2.The direct voltage being supplied to main power source input terminal Vd is converted to the driving alternating voltage corresponding to the pwm signal provided from control part 3 by inverter 2.This driving alternating voltage is applied to the motor driven winding L be installed in motor by inverter 2
1, L
2, L
3.Thus, alternating current flows through motor driven winding L
1, L
2, L
3, thus the rotor in drive motor rotates.
In addition, this motor drive possesses output voltage V
dCmain power source 4 and output voltage V
cCcontrol power supply 5 as electric power source.The output of main power source 4 provides line 41 to be connected with the main power source input terminal Vd of inverter 2 by mains electricity, and thus, the electric power of inverter 2 automatic power supply 4 in future is supplied to motor driven winding L
1, L
2, L
3.And; the output controlling power supply 5 provides line 51 by controlling power; the circuit protecting element 12 of line 51 being also provided by being arranged at this control power, being connected with the control power input terminal Vc of inverter 2 and the control power input terminal Vc of control part 3 respectively.Main power source 4 is with motor driven winding L
1, L
2, L
3energising drive as main purpose and the power supply that arranges, its power output capacity is set to comparatively large, and by output voltage V
dCalso high voltage is set to.On the other hand, controlling power supply 5 is power supplys in order to the function action making the low-power circuit actions such as control circuit arrange, the little and output voltage V with main power source 4 phase specific power output capacity
cCalso be low-voltage.Such as, as the specified output of power supply of air blast being used in aircondition, main power source 4 is set to voltage 140V, electric current 1A, on the other hand, control power supply 5 is set to voltage 15V, electric current 200mA.
In addition, in control part 3, control signal input terminal V is provided with
sPwith these two interfaces of rotating signal lead-out terminal FG, be connected with the port of microcomputer 6 of the outside being positioned at motor drive circuit 1 respectively.From microcomputer 6 by control signal input terminal V
sProtary speed, position of rotation are indicated to control part 3.In addition, the rotary speed detected, position of rotation are informed to microcomputer 6 by rotating signal lead-out terminal FG by control part 3.
Fig. 2 is the action specification figure of the motor drive of embodiments of the present invention 1, and an example of the action be included in device when being short-circuited fault is shown.Electric current I from controlling power supply 5 shown in Figure 2
cC, circuit protecting element 12 the input voltage V of control power supply 5 side
cCIN, and from circuit protecting element 12 to the output voltage V of control part 3 and inverter 2
cCOUTtemporal changes.
In fig. 2, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, output voltage V
cC=V
cC0be imported into inverter 2 and control part 3 from control power supply 5 by circuit protecting element 12, make electric current I
cC=I
cC0circulation.
Then, at moment t=t
1time, if at least one fault that is short-circuited for a certain reason in inverter 2 and control part 3, then cause impedance to decline by short circuit, thus from the electric current I controlling power supply 5
cCbecome electric current I as shown in Figure 2
cC=I
cC1, produce electric current extremely large compared with time normal.Because of this current value I
cC1electric current I
cCand produce Joule heat in circuit protecting element 12 inside, thus at moment t=t
2time, circuit protecting element 12 breaks, and makes electric current I
cC=0, make current value during fault be I
cC1electric current I
cCcut-off.That is, circuit protecting element 12 utilizes the Joule heat produced by the electric current flowing through self to make fuse itself, cut off the element cutting off electric current, such as, is fuse, miniature fuse or fusing resistor.
In addition, at generation current I
cC=I
cC1moment t=t
1~ t
2period, control the input voltage V of output voltage, the i.e. circuit protecting element 12 of power supply 5
cCINbe declined to become the magnitude of voltage V in figure
cC1.In addition, owing to causing impedance to increase by the Joule heat of circuit protecting element 12, output voltage V
cCOUTbe down to magnitude of voltage V
cC1 'afterwards, at moment t=t
2time be 0.
Like this, even if as controlling the inverter 2 of load of power supply 5, control part 3 is short-circuited fault, this motor drive also can carry out action and make circuit protecting element 12 disengagement failure electric current.Therefore, according to the present embodiment, can prevent from causing by this problem of load-side short circuit the situation controlling power failure.
And; when as being short-circuited in the output of the output of high-tension main power source 4 and the control power supply 5 of low-voltage; in the structure of this motor drive, owing to flowing into the electric current of control power supply 5 from high-tension main power source 4, circuit protecting element 12 produces Joule heat.And circuit protecting element 12 carries out action and makes to cut off this electric current.Therefore, according to the present embodiment, the high voltage due to main power source 4 also can be prevented to be continuously applied to control power supply 5 or big current to flow into from main power source 4 to control power supply 5 and control the destroyed situation of the structural element of power supply 5.That is, according to the present embodiment, can also prevent from causing by applying this problem of high voltage the situation controlling power failure.
As mentioned above, when motor drive of the present invention breaks down in motor drive circuit, carry out by circuit protecting element the big current that the little control power supply of rupturing duty capacity produces, therefore control power supply and be not destroyed.
In addition; also there is following methods: as circuit protecting element; when when the loss due to fault current, temperature rises; using PTC (PositiveTemperatureCoefficient: positive temperature coefficient, the i.e. positive temperature characterisitic) thermistor in advance with the characteristic becoming large impedance under certain temperature conditions, when breaking down, short circuit current being restricted to minimum value.
(execution mode 2)
Fig. 3 is the structure chart of the motor drive of embodiments of the present invention 2.As shown in Figure 3, the motor drive of present embodiment, in the same manner as execution mode 1, possesses motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1, microcomputer 6, main power source 4 and control power supply 5.In addition, in the present embodiment, be configured to higher level equipment side electric base 9 possess microcomputer 6, main power source 4 and control power supply 5.
In higher level equipment side electric base 9, main power source 4 is made up of rectifier 10 and electrolytic capacitor 11, and it carries out to the alternating voltage from the source power supply 8 as commercial ac power source the output voltage V that rectification smoothly exports direct current
dC.Control power supply 5 by as the DC/DC transducer 13 of voltage conversion unit and transistor Q
0form, export the output voltage V from main power source 4
dCthe voltage obtained is lower than output voltage V
dCthe output voltage V of direct current
cC.As concrete one example, when Japan, as source power supply 8, provide the alternating electromotive force of voltage 100V.So, export output voltage V from main power source 4
dCbe about the direct voltage of 140V.In addition, in order to make low-power circuit action, DC/DC transducer 13 is by the output voltage V of this high-voltage direct-current more than 100V
dCbe converted to the output voltage V of the low-voltage direct-current of below 20V
cC.And, from the transistor Q being arranged at the outlet side controlling power supply 5
0the output voltage V of emitter output LOW voltage direct current
cC.In addition, the structure of motor drive circuit 1 is identical with execution mode 1, therefore omits the description.
Fig. 4 is the action specification figure of the motor drive of embodiments of the present invention 2, and an example of the action be included in device when being short-circuited fault is shown.In the diagram, the electric current I carrying out automatic power supply 4 of situation about also comprising when breaking down is shown
dC, from controlling the electric current I of power supply 5
cC, circuit protecting element 12 the input voltage V of control power supply 5 side
cCIN, from circuit protecting element 12 to the output voltage V of control part 3 and inverter 2
cCOUTchange.
In the diagram, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
dCinverter 2 is imported into, to motor driven winding L from main power source 4
1, L
2, L
3there is provided electric power, generation current value I
dC0electric current I
dC.And, output voltage V
cC=V
cC0be imported into inverter 2 and control part 3 from control power supply 5 by circuit protecting element 12, make electric current I
cC=I
cC0circulation.
Then, at moment t=t
1time, if cause inverter 2 to be short-circuited fault for a certain reason, then carry out the electric current I of automatic power supply 4
dCproduce the current value I become as shown in Figure 4
dC1big current.Thus, fault feeds through to control power supply 5 side or the control part 3 of inverter 2, at moment t=t
11time, about the transistor Q from control power supply 5
0electric current I
cC, cause impedance to decline by short circuit, thus make electric current I
cC=I
cC1, produce electric current extremely large compared with time normal.Due to this current value I
cC1electric current I
cCand produce Joule heat in circuit protecting element 12 inside, thus as moment t=t
21time, circuit protecting element 12 breaks, and makes electric current I
cC=0, make current value I when breaking down
cC1electric current I
cCcut-off.
In addition, at generation current I
cC=I
cC1moment t=t
11~ t
21period, control the input voltage V of output voltage, the i.e. circuit protecting element 12 of power supply 5
cCINbe declined to become the magnitude of voltage V in figure
cC1.In addition, owing to causing impedance to increase by the Joule heat of circuit protecting element 12, output voltage V
cCOUTbe down to magnitude of voltage V
cC1 'afterwards, at moment t=t
21time be 0.
On the other hand, electric current I
dCat moment t=t
2time, make electric current I due to the broken string of inverter 2 inside or the broken string of not shown circuit block
dC=0.Enumerate in the drawings at moment t=t
2=t
11when the example that simultaneously produces, but also can be the different moment.
As mentioned above, motor drive of the present invention, when motor drive circuit breaks down, carrys out by circuit protecting element the big current that cutting-off controlling power supply produces, and therefore controls power supply and is not destroyed.In addition, in the same manner as execution mode 1, also can prevent by circuit protecting element the problem controlling power failure because the control power supply from high-tension main power source to low-voltage applies high voltage.In addition, also there is following methods: as circuit protecting element, use PTC thermistor as described above, when fault, short circuit current is restricted to minimum value.
(execution mode 3)
Fig. 5 is the structure chart of the motor drive of embodiments of the present invention 3.As shown in Figure 5, the motor drive of present embodiment in the same manner as execution mode 2, by motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1 and possess microcomputer 6, main power source 4 and control the higher level equipment side electric base 9 of power supply 5 forming.The motor drive of present embodiment, except in motor drive circuit 1, the control power input terminal Vc of inverter 2 is provided with the resistance R as the first resistance
1in addition, other is identical with the structure of the motor drive of execution mode 2, omits the explanation of same structure key element.
Fig. 6 is the action specification figure of the motor drive of embodiments of the present invention 3, and an example of the action be included in device when being short-circuited fault is shown.In figure 6, the electric current I carrying out automatic power supply 4 of situation about also comprising when breaking down is shown
dC, flow to the electric current I of inverter 2 from controlling power supply 5
cC (INV), from controlling the electric current I in power supply 5 traffic organising portion 3
cC (IC), both summation and electric current I
cC, circuit protecting element 12 the input voltage V of control power supply 5 side
cCIN, and from circuit protecting element 12 to the output voltage V of control part 3 and inverter 2
cCOUTchange.
In figure 6, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
dCinverter 2 is imported into, to motor driven winding L from main power source 4
1, L
2, L
3there is provided electric power, generation current value I
dC0electric current I
dC.And, output voltage V
cC=V
cC0inverter 2 and control part 3 is imported into by circuit protecting element 12 from control power supply 5.Thus, current value I
cC (INV) 0electric current I
cC (INV)flow to inverter 2, current value I
cC (IC) 0electric current I
cC (IC)traffic organising portion 3, and flow out electric current I from control power supply 5
cC=I
cC0=I
cC (INV) 0+ I
cC (IC) 0.
Then, at moment t=t
1time, if cause inverter 2 to be short-circuited fault for a certain reason, then carry out the electric current I of automatic power supply 4
dCproduce current value I as shown in Figure 6
dC1big current.Thus, fault feeds through to control power supply 5 side of inverter 2, at moment t=t
11time, about the transistor Q from control power supply 5
0electric current I
cC (INV), cause impedance to decline by short circuit, thus make electric current I
cC (INV)=I
cC (INV) 1, produce than electric current larger time normal.But, by resistance R
1make current value I
cC (INV) 1value converge on transistor Q
0allowed band in.By current value I
cC (INV) 1electric current I
cC (INV), make electric current I
cCalso be current value I
cC1, produce than electric current relatively large time normal.Due to this current value I
cC1electric current I
cCand produce Joule heat in circuit protecting element 12 inside, thus as moment t=t
21time, circuit protecting element 12 breaks, and makes electric current I
cC=0, make current value I when breaking down
cC1electric current I
cCcut-off.
In addition, at generation short circuit current I
cC=I
cC1moment t=t
11~ t
21period, control the input voltage V of output voltage, the i.e. circuit protecting element 12 of power supply 5
cCINbe declined to become the magnitude of voltage V in figure
cC1, and current value when breaking down is subject to resistance R
1restriction, therefore decline is less compared with the current value of execution mode 2.In addition, owing to causing impedance to increase by the Joule heat of circuit protecting element 12, output voltage V
cCOUTbe down to magnitude of voltage V
cC1 'afterwards, at moment t=t
21time be 0.
Preset resistance R
1resistance value, when making to break down produce electric current I
cCcurrent value be control the transistor Q of power supply 5
0allowed band in value and enough make the value that circuit protecting element breaks.
On the other hand, electric current I
dCat moment t=t
2time, due to the broken string of inverter 2 inside or the broken string of not shown circuit block, make electric current I
dC=0.Enumerate in the drawings at moment t=t
2=t
11when the example that simultaneously produces, but also can be the different moment.
In addition, as the resistance R of the first resistance
1prepare when inverter 2 is short-circuited fault, be arranged at the control power input terminal Vc side of inverter 2, but resistance R
1also can prepare when control part 3 is short-circuited fault, be arranged at the control power input terminal Vc side of control part 3, also can resistance R1 be both set.
As mentioned above, motor drive of the present invention is by resistance R
1after being limited in the higher limit controlling the electric current that power supply produces when motor drive circuit breaks down, cut off electric current by circuit protecting element, therefore control power supply and be not destroyed.In addition, in the same manner as execution mode 1 ~ 2, can also prevent from causing control power supply to be destroyed by the high voltage of main power source.In addition, also there is following methods: as circuit protecting element, use PTC thermistor as described above, when breaking down, short circuit current being restricted to minimum value.
(execution mode 4)
Use Fig. 7 and Fig. 8 that the motor drive of embodiments of the present invention 4 is described.Fig. 7 is the structure chart of the motor drive of embodiments of the present invention 4.As shown in Figure 7, the motor drive of present embodiment in the same manner as execution mode 2 ~ 3, by motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1 and possess microcomputer 6, main power source 4 and control the higher level equipment side electric base 9 of power supply 5 forming.
In the figure 7, inverter 2 with switch element 16, high-voltage I C (representing with HVIC in the drawings) 15 and floating power supply 14 for primary structure key element.The insulated gate electrode transistor npn npn Q that switch element 16 is connected by totem pillar
1, Q
2, Q
3, Q
4, Q
5, Q
6form.High-voltage I C15 is configured to the raster data model being used in switch element 16, and each transistor to switch element 16 exports signal.And floating power supply 14 is arranged for producing in each transistor of switch element 16, main power source 4 side and upper arm side each transistor Q
1, Q
2, Q
3grid voltage.In addition, floating power supply 14 is configured to by the resistance R as the first resistance
1with diode D
101, D
102, D
103the electric power provided from control power supply 5 is provided.Other structure is identical with execution mode 3, omits the explanation of same structure key element.
Fig. 8 is the action specification figure of the motor drive of embodiments of the present invention 4, and an example of the action be included in device when being short-circuited fault is shown.In fig. 8, the electric current I carrying out automatic power supply 4 of situation about also comprising when breaking down is shown
dC, flow to the electric current I of floating power supply 14 from controlling power supply 5
cC (boot), flow to the electric current I of high-voltage I C15
cC (INV), traffic organising portion 3 electric current I
cC (IC), the summation of three and electric current I
cC, circuit protecting element 12 the input voltage V of control mains side
cCIN, and from circuit protecting element 12 to the output voltage V of control part 3 and inverter 2
cCOUTchange.
In fig. 8, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
dCinverter 2 is imported into, to motor driven winding L from main power source 4
1, L
2, L
3there is provided electric power, generation current value I
dC0electric current I
dC.And, output voltage V
cC=V
cC0floating power supply 14, high-voltage I C15 and control part 3 is imported into by circuit protecting element 12 from control power supply 5.Thus, current value I
cC (boot) 0electric current I
cC (boot)flow to floating power supply 14, current value I
cC (INV) 0electric current I
cC (INV)flow to high-voltage I C15, current value I
cC (IC) 0electric current I
cC (IC)traffic organising portion 3, and, flow out electric current I from control power supply 5
cC=I
cC0=I
cC (boot) 0+ I
cC (INV) 0+ I
cC (IC) 0.
Then, at moment t=t
1time, if cause the switch element 16 of motor drive circuit 1 to be short-circuited fault for a certain reason, then carry out the electric current I of automatic power supply 4
dCproduce current value I as shown in Figure 8
dC1big current.Thus, fault feeds through to floating power supply 14, at moment t=t
11time, about the transistor Q from control power supply 5
0electric current I
cC (boot), cause impedance to decline by short circuit, thus make electric current I
cC (boot)=I
cC (boot) 1, produce than electric current larger time normal.But, by resistance R
1make current value I
cC (boot) 1value converge on transistor Q
0allowed band in.By current value I
cC (boot) 1electric current I
cC (boot), electric current I
cCalso current value I is become
cC1, produce than electric current relatively large time normal.Due to this current value I
cC1electric current I
cCand produce Joule heat in circuit protecting element 12 inside, thus as moment t=t
21time, circuit protecting element 12 breaks, and makes electric current I
cC=0, make big current value I when breaking down
cC1electric current I
cCcut-off.
In addition, at generation short circuit current I
cC=I
cC1moment t=t
11~ t
21period, control the input voltage V of output voltage, the i.e. circuit protecting element 12 of power supply 5
cCINbe declined to become magnitude of voltage V
cC1but current value when breaking down is subject to resistance R
1restriction, therefore decline is less compared with the current value of execution mode 2.In addition, owing to causing impedance to increase by the Joule heat of circuit protecting element 12, output voltage V
cCOUTbe down to magnitude of voltage V
cC1 'afterwards, at moment t=t
21time be 0.
Preset resistance R
1resistance value make when breaking down produce electric current I
cCcurrent value be control the transistor Q of power supply 5
0allowed band in value and enough make the value that circuit protecting element breaks.
On the other hand, electric current I
dCat moment t=t
2time, due to the broken string of inverter 2 inside or the broken string of not shown circuit block, make electric current I
dC=0.In the drawings, enumerated at moment t=t
2=t
11when the example that simultaneously produces, but also can be the different moment.
As mentioned above, motor drive of the present invention is passing through resistance R
1after controlling the higher limit of the electric current that power supply produces when restrictions motor drive circuit breaks down, cut off electric current by circuit protecting element, therefore control power supply and be not destroyed.In addition, in the same manner as execution mode 1 ~ 3, can also prevent from causing control power supply to be destroyed by the high voltage of main power source.In addition, also there is following methods: as circuit protecting element, use PTC thermistor as described above, when fault, short circuit current is restricted to minimum value.
(execution mode 5)
Use Fig. 9 and Figure 10 that the motor drive of embodiments of the present invention 5 is described.Fig. 9 is the structure chart of the motor drive of embodiments of the present invention 5.As shown in Figure 9, the motor drive of present embodiment in the same manner as execution mode 2 ~ 4, by motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1 and possess microcomputer 6, main power source 4 and control the higher level equipment side electric base 9 of power supply 5 forming.
The motor drive of present embodiment has the structure of the circuit protecting element 12 only eliminated in the motor drive circuit 1 of execution mode 3, and other structure is identical with execution mode 3.
Figure 10 is the action specification figure of the motor drive of embodiments of the present invention 5, and an example of the action be included in device when being short-circuited fault is shown.In Fig. 10, the electric current I carrying out automatic power supply 4 of situation about also comprising when breaking down is shown
dC, flow to the electric current I of inverter 2 from controlling power supply 5
cC (INV), traffic organising portion 3 electric current I
cC (IC), both summation and electric current I
cC, and control the output voltage V of power supply 5
cCchange.
In Fig. 10, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
dCinverter 2 is imported into, to motor driven winding L from main power source 4
1, L
2, L
3there is provided electric power, generation current value I
dC0electric current I
dC.And, output voltage V
cC=V
cC0export from control power supply 5, be imported into inverter 2 and control part 3.Thus, current value I
cC (INV) 0electric current I
cC (INV)flow to inverter 2, current value I
cC (IC) 0electric current I
cC (IC)traffic organising portion 3, and flow out electric current I from control power supply 5
cC=I
cC0=I
cC (INV) 0+ I
cC (IC) 0.
Then, at moment t=t
1time, if cause the inverter 2 of motor drive circuit 1 to be short-circuited fault for a certain reason, then carry out the electric current I of automatic power supply 4
dCproduce current value I as shown in Figure 10
dC1big current.Thus, fault feeds through to control power supply 5 side of inverter 2, at moment t=t
11time, about the transistor Q from control power supply 5
0electric current I
cC (INV), cause impedance to decline by short circuit, thus make electric current I
cC (INV)=I
cC (INV) 1, produce than electric current larger time normal.But, by the resistance R as the first resistance
1make current value I
cC (INV) 1value converge on transistor Q
0allowed band in.By current value I
cC (INV) 1electric current I
cC (INV), electric current I
cCalso current value I is become
cC1, produce than electric current relatively large time normal, later flow-thru electrode flow valuve I continuously
cC1electric current I
cC.Current value I
cC1than value larger time normal, but relative to transistor Q
0allowed band also have more than needed, therefore can not affect the output voltage V controlling power supply 5
cCmagnitude of voltage.
Preset resistance R
1resistance value make when breaking down electric current I
cCeven if current value produce continuously also for controlling the transistor Q of power supply 5
0allowed band in value.
On the other hand, electric current I
dCat moment t=t
2time, due to the broken string of inverter 2 inside or the broken string of not shown circuit block, make electric current I
dC=0.In the drawings, enumerated at moment t=t
2=t
11when the example that simultaneously produces, but also can be the different moment.
Resistance R
1prepare when inverter 2 is short-circuited fault, be arranged at the control power input terminal Vc side of inverter 2, but also can prepare when control part 3 is short-circuited fault, be arranged at the control power input terminal Vc side of control part 3, also can resistance R1 be both set.
As mentioned above, motor drive of the present invention is by resistance R
1control the higher limit of the electric current that power supply produces when restrictions motor drive circuit breaks down, therefore control power supply and be not destroyed.
(execution mode 6)
Use Figure 11 and Figure 12 that the motor drive of embodiments of the present invention 6 is described.Figure 11 is the structure chart of the motor drive of embodiments of the present invention 6.As shown in figure 11, the motor drive of present embodiment in the same manner as execution mode 2 ~ 5, by motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1 and possess microcomputer 6, main power source 4 and control the higher level equipment side electric base 9 of power supply 5 forming.The motor drive of present embodiment has the structure of the circuit protecting element 12 only eliminated in the motor drive circuit 1 of execution mode 4, and other structure is identical with execution mode 4.
Figure 12 is the action specification figure of the motor drive of embodiments of the present invention 6, and an example of the action be included in device when being short-circuited fault is shown.In fig. 12, the electric current I carrying out automatic power supply 4 of situation about also comprising when breaking down is shown
dC, flow to the electric current I of floating power supply 14 from controlling power supply 5
cC (boot), flow to the electric current I of high-voltage I C (HVIC) 15
cC (INV), traffic organising portion 3 electric current I
cC (IC), the summation of three and electric current I
cC, and control the output voltage V of power supply 5
cCchange.
In fig. 12, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
dCinverter 2 is imported into, to motor driven winding L from main power source 4
1, L
2, L
3there is provided electric power, generation current value I
dC0electric current I
dC.And, export output voltage V from control power supply 5
cC=V
cC0, current value I
cC (boot) 0electric current I
cC (boot)flow to floating power supply 14, current value I
cC (INV) 0electric current I
cC (INV)flow to high-voltage I C15, current value I
cC (IC) 0electric current I
cC (IC)traffic organising portion 3, and flow out electric current I from control power supply 5
cC=I
cC0=I
cC (boot) 0+ I
cC (INV) 0+ I
cC (IC) 0.
Then, at moment t=t
1time, cause the switch element 16 of motor drive circuit 1 to be short-circuited fault for a certain reason, therefore carry out the electric current I of automatic power supply 4
dCproduce current value I as shown in figure 12
dC1big current.Thus, fault feeds through to floating power supply 14, at moment t=t
11time, about the transistor Q from control power supply 5
0electric current I
cC (boot), cause impedance to decline by short circuit, thus make electric current I
cC (boot)=I
cC (boot) 1, produce than electric current larger time normal.But, by resistance R
1make current value I
cC (boot) 1value converge on transistor Q
0allowed band in.By current value I
cC (boot) 1electric current I
cC (boot), electric current I
cCalso current value I is become
cC1, produce than electric current relatively large time normal.This current value I
cC1electric current I
cCthan value larger time normal, but relative to transistor Q
0allowed band also have more than needed, therefore can not affect the output voltage V controlling power supply 5
cCmagnitude of voltage.
Preset resistance R
1the electric current I that produces when making to break down of resistance value
cCeven if current value produce continuously also for controlling the transistor Q of power supply 5
0allowed band in value.
On the other hand, electric current I
dCat moment t=t
2time, due to the broken string of inverter 2 inside or the broken string of not shown circuit block, make electric current I
dC=0.In the drawings, enumerated at moment t=t
2=t
11when the example that simultaneously produces, but also can be the different moment.
As mentioned above, motor drive of the present invention is by resistance R
1control the higher limit of the electric current that power supply produces when restrictions motor drive circuit breaks down, therefore control power supply and be not destroyed.
(execution mode 7)
Use Figure 13 and Figure 14 that the motor drive of embodiments of the present invention 7 is described.Figure 13 is the structure chart of the motor drive of embodiments of the present invention 7.As shown in figure 13, the motor drive of present embodiment in the same manner as execution mode 2 ~ 6, by motor driven winding L
1, L
2, L
3carry out logical electrically driven (operated) motor drive circuit 1 and possess microcomputer 6, main power source 4 and control the higher level equipment side electric base 9 of power supply 5 forming.
The motor drive of present embodiment is configured to, and in the motor drive circuit 1 of execution mode 6, provides resistance R line 41 being provided as the second resistance in the mains electricity carrying out automatic power supply 4
2, provide on line 51 in the control power from control power supply 5 and circuit protecting element 12 and the diode D as the first diode be set
1, control signal wire arranges diode D
2, and diode D is set on rotating signal line
3, other structure is identical with execution mode 6.
Figure 14 is the action specification figure of the motor drive of embodiments of the present invention 7, and an example of the action be included in device when being short-circuited fault is shown.In fig. 14, the electric current I carrying out automatic power supply 4 of situation about also comprising when breaking down is shown
dC, flow to the electric current I of floating power supply 14 from controlling power supply 5
cC (boot), flow to the electric current I of high-voltage I C (HVIC) 15
cC (INV), traffic organising portion 3 electric current I
cC (IC), the summation of three and electric current I
cC, diode D
1negative electrode K side voltage V
cC (D1K), circuit protecting element 12 the input voltage V of control power supply 5 side
cCIN, and from circuit protecting element 12 to the output voltage V of control part 3 and inverter 2
cCOUTchange.
In fig. 14, current, at moment t=t
0time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
dCfrom main power source 4 by resistance R
2be imported into inverter 2, to motor driven winding L
1, L
2, L
3there is provided electric power, generation current value I
dC0electric current I
dC.And, output voltage V
cC=V
cC0from control power supply 5 by circuit protecting element 12 and diode D
1to deduct diode D
1the mode of forward voltage VF be provided.By providing this output voltage V
cC, current value I
cC (boot) 0electric current I
cC (boot)flow to floating power supply 14, current value I
cC (INV) 0electric current I
cC (INV)flow to high-voltage I C15, current value I
cC (IC) 0electric current I
cC (IC)traffic organising portion 3, and flow out electric current I from control power supply 5
cC=I
cC0=I
cC (boot) 0+ I
cC (INV) 0+ I
cC (IC) 0.
Then, at moment t=t
1time, if cause the switch element 16 of motor drive circuit 1 to be short-circuited fault for a certain reason, then carry out the electric current I of automatic power supply 4
dCproduce current value I as shown in figure 14
dC1big current.Thus, fault feeds through to high-voltage I C15, control part 3, floating power supply 14, thus is providing the diode D of line 51 from the control power controlling power supply 5
1negative electrode K side produce large magnitude of voltage V
dC0voltage V
cC (D1K).But, diode D
1be in reverse bias condition, therefore at diode D
1anode A side do not produce high voltage.
Then, as moment t=t
2time, resistance R
2broken string, diode D
1the voltage of negative electrode K side also decline, make electric current I
dC=0.Then, at moment t=t
11time, about the transistor Q from control power supply 5
0electric current I
cC (boot), cause impedance to decline by short circuit, thus make electric current I
cC (boot)=I
cC (boot) 1, produce than electric current larger time normal.But, by resistance R
1make current value I
cC (boot) 1value converge on transistor Q
0allowed band in.By current value I
cC (boot) 1electric current I
cC (boot), electric current I
cCalso current value I is become
cC1, produce than electric current relatively large time normal.Due to this current value I
cC1electric current I
cCand produce Joule heat in circuit protecting element 12 inside, thus as moment t=t
21time, circuit protecting element 12 breaks, and makes electric current I
cC=0, make big current value I during fault
cC1electric current I
cCcut-off.
In addition, at generation short circuit current I
cC=I
cC1moment t=t
11~ t
21period, owing to causing impedance to increase by the Joule heat of circuit protecting element 12, output voltage V
cCOUTbe down to magnitude of voltage V
cC1 'afterwards, at moment t
21time make output voltage V
cCOUT=0.
Preset resistance R
1the electric current I that produces when making to break down of resistance value
cCcurrent value be control the transistor Q of power supply 5
0allowed band in value and enough make the value that circuit protecting element breaks.
In addition, in the drawings, enumerated at moment t=t
2=t
11when the example that simultaneously produces, but also can be the different moment.
In addition, diode D is set
2with diode D
3object be, prevent the short trouble of switch element 16 from feeding through to control part 3 and the port of microcomputer 6 is applied in excessive voltage, cause microcomputer 6 to break down.
As mentioned above, motor drive of the present invention is by resistance R
1after controlling the higher limit of the electric current that power supply produces when restrictions motor drive circuit breaks down, cut off electric current by circuit protecting element, therefore control power supply and be not destroyed.
In addition, also there is following methods: as circuit protecting element, use PTC thermistor as described above, when breaking down, short circuit current being restricted to minimum value.
Claims (10)
1. a motor drive, is characterized in that, possesses:
Inverter, it is transfused to the voltage from controlling power supply, to provide electric power from main power source to motor driven winding; And
Control part, above-mentioned control power supply is produced the power on signal to above-mentioned inverter by it as electric power source,
Wherein, circuit protecting element is arranged between above-mentioned control power supply and above-mentioned control part, and this circuit protecting element protects above-mentioned control power supply when the load short circuits of above-mentioned control power supply,
Above-mentioned inverter comprises: floating power supply, provides electric power from above-mentioned control power supply by this floating power supply of multiple diode pair; Switch element, it comprises the insulated gate transistor be connected with above-mentioned main power source totem pillar; And the high-voltage I C of the raster data model of insulated gate transistor,
First resistance is arranged between above-mentioned floating power supply and foregoing circuit protection component; this first resistance limits the fault current during short circuit of above-mentioned inverter and above-mentioned control part, enough makes foregoing circuit protection component break in the permission current range being in above-mentioned control power supply to make the value of above-mentioned fault current.
2. motor drive according to claim 1, is characterized in that,
Commercial ac power source is carried out the direct voltage that rectification smoothly obtains by above-mentioned main power source output,
The lead-out terminal of above-mentioned control power supply possesses transistor, exports the voltage of the voltage lower than main power source obtained from above-mentioned main power source by voltage conversion unit.
3. motor drive according to claim 1, is characterized in that,
Second resistance is arranged between above-mentioned main power source and above-mentioned inverter, and the first diode is arranged between foregoing circuit protection component and above-mentioned control part.
4. motor drive according to claim 2, is characterized in that,
Second resistance is arranged between above-mentioned main power source and above-mentioned inverter, and the first diode is arranged between foregoing circuit protection component and above-mentioned control part.
5. the motor drive according to any one in Claims 1 to 4, is characterized in that,
Foregoing circuit protection component is fuse.
6. the motor drive according to any one in Claims 1 to 4, is characterized in that,
Foregoing circuit protection component is miniature fuse.
7. the motor drive according to any one in Claims 1 to 4, is characterized in that,
Foregoing circuit protection component is fusing resistor.
8. a motor drive, is characterized in that, possesses:
Main power source, commercial ac power source is carried out the direct voltage that rectification smoothly obtains by its output;
Control power supply, its lead-out terminal possesses transistor, exports the voltage of the voltage lower than main power source obtained from above-mentioned main power source by voltage conversion unit;
Inverter, it is transfused to voltage from above-mentioned control power supply as function action power supply, to provide electric power from above-mentioned main power source to motor driven winding; And
Control part, above-mentioned control power supply is produced the power on signal to above-mentioned inverter by it as electric power source,
Wherein, first resistance to be arranged between above-mentioned control power supply and above-mentioned inverter and between above-mentioned control power supply and above-mentioned control part at least one party, the fault current that this first resistance produces when limiting any one short circuit in above-mentioned inverter and above-mentioned control part, is in the permission current range of above-mentioned control power supply to make the value of above-mentioned fault current.
9. motor drive according to claim 8, is characterized in that, also possesses:
Floating power supply, provides electric power from above-mentioned control power supply by this floating power supply of multiple diode pair; And,
Switch element, it comprises the insulated gate transistor be connected with above-mentioned main power source totem pillar,
Wherein, above-mentioned inverter comprises the high-voltage I C of the raster data model of insulated gate transistor,
Above-mentioned first resistance is arranged between above-mentioned floating power supply and above-mentioned control power supply.
10. motor drive according to claim 8 or claim 9, is characterized in that,
Second resistance is arranged between above-mentioned main power source and above-mentioned inverter, and the first diode is arranged between above-mentioned control power supply and above-mentioned control part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-243297 | 2011-11-07 | ||
| JP2011243297A JP5533840B2 (en) | 2011-11-07 | 2011-11-07 | Motor drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103095208A CN103095208A (en) | 2013-05-08 |
| CN103095208B true CN103095208B (en) | 2016-01-20 |
Family
ID=48207431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210441173.8A Active CN103095208B (en) | 2011-11-07 | 2012-11-07 | Motor drive |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5533840B2 (en) |
| CN (1) | CN103095208B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024592B (en) * | 2014-04-25 | 2017-11-10 | 中山大洋电机股份有限公司 | A kind of BLDC electrical faults State Feedback Approach and application BLDC motors, air-conditioning system |
| EP3627686B1 (en) * | 2017-05-16 | 2022-02-09 | Panasonic Intellectual Property Management Co., Ltd. | Motor drive device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030738A (en) * | 2006-03-01 | 2007-09-05 | 松下电器产业株式会社 | Direct current device and motor control device having same |
| CN101714753A (en) * | 2008-10-01 | 2010-05-26 | 日本电产芝浦株式会社 | Control circuit for motor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1169841A (en) * | 1997-08-20 | 1999-03-09 | Fuji Electric Co Ltd | Power circuit of power converter |
| JP2001039240A (en) * | 1999-07-26 | 2001-02-13 | Auto Network Gijutsu Kenkyusho:Kk | Feeder system for vehicle |
| JP2001068304A (en) * | 1999-08-24 | 2001-03-16 | Auto Network Gijutsu Kenkyusho:Kk | Circuit protector |
| JP4660932B2 (en) * | 2001-01-26 | 2011-03-30 | パナソニック株式会社 | Motor drive device |
| JP2002238287A (en) * | 2001-03-15 | 2002-08-23 | Zexel Valeo Climate Control Corp | Motor-driving apparatus |
| JP3897235B2 (en) * | 2001-11-16 | 2007-03-22 | 株式会社デンソー | Motor control device |
| JP2005198377A (en) * | 2004-01-05 | 2005-07-21 | Matsushita Electric Ind Co Ltd | Inverter controller for motor drive |
| JP2007110867A (en) * | 2005-10-17 | 2007-04-26 | Matsushita Electric Ind Co Ltd | Motor drive unit |
-
2011
- 2011-11-07 JP JP2011243297A patent/JP5533840B2/en active Active
-
2012
- 2012-11-07 CN CN201210441173.8A patent/CN103095208B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030738A (en) * | 2006-03-01 | 2007-09-05 | 松下电器产业株式会社 | Direct current device and motor control device having same |
| CN101714753A (en) * | 2008-10-01 | 2010-05-26 | 日本电产芝浦株式会社 | Control circuit for motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103095208A (en) | 2013-05-08 |
| JP5533840B2 (en) | 2014-06-25 |
| JP2013099231A (en) | 2013-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103380567B (en) | Power inverter | |
| CN101330251B (en) | Protection for permanent magnet motor control circuits | |
| CN104734681B (en) | Monitoring method and equipment for power semiconductor switch | |
| CN107534384B (en) | Frequency converter with short-circuit interruption in half-bridge | |
| CN106688183A (en) | Short-circuit protection circuit for self-arc-extinguishing semiconductor element | |
| CN106559025A (en) | Electric tool and its motor driven systems | |
| CN105720561B (en) | Protection circuit and inverter system for inverter | |
| CN103954902A (en) | Fault detection method and fault detection device for direct-current motor drive and control circuit | |
| JP6469894B2 (en) | Power converter | |
| CN102969918B (en) | Three-phase bridge type converter system and promptly descend short-circuit protection circuit | |
| CN207884588U (en) | Safe torque breaking circuit | |
| CN103095208B (en) | Motor drive | |
| CN104852356A (en) | Motor control protector | |
| JP6194047B2 (en) | Gate driver | |
| JP5961854B2 (en) | Motor drive circuit | |
| CN203965581U (en) | The failure detector of direct current generator Drive and Control Circuit | |
| CN105324934B (en) | Double dynamical mode drivers | |
| JP2007068336A (en) | Electric circuit | |
| CN103563488B (en) | For the controller of the AC-DC converter of LED illumination | |
| CN211266446U (en) | Circuit breaker protection device | |
| JPWO2008035519A1 (en) | Air conditioner | |
| CN107027207B (en) | IGBT protection circuit and induction cooker | |
| CN206821036U (en) | IGBT protection circuit and electromagnetism stove | |
| CN211481491U (en) | Relay control circuit, drive circuit and electrical equipment | |
| CN204481729U (en) | A kind of permanent-magnet brushless DC electric machine control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |