CN103095208A - Motor driving device - Google Patents
Motor driving device Download PDFInfo
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- CN103095208A CN103095208A CN2012104411738A CN201210441173A CN103095208A CN 103095208 A CN103095208 A CN 103095208A CN 2012104411738 A CN2012104411738 A CN 2012104411738A CN 201210441173 A CN201210441173 A CN 201210441173A CN 103095208 A CN103095208 A CN 103095208A
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- motor drive
- voltage
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Abstract
The present invention provides a motor driving device which is provided with the following components: an inverter part in which the voltage from a control power supply is input for supplying electric power from a main power supply to a driving winding of the motor; and a control part which generates an energizing signal to the inverter part while the control power supply is used as an electric power source, wherein, a circuit protection component is equipped at an electric power supply line of the control power supply, thereby protecting the control power supply when the load of the control power supply is shorted.
Description
Technical field
The present invention relates to a kind of motor drive that is used in the air blasts such as aircondition, particularly relate to a kind of prevent by motor drive destroyed and make fault feed through to the technology of higher level equipment.
Background technology
In the past, motor drive as the air blast that is used in aircondition, known following motor drive: be provided as DC power supply to the electric power source of the winding of motor from the outside, as to the control power supply of the electric power source of each parts of the inscape of drive unit and bring into play function to the running instruction of motor, the rotating signal of motor is outputed to outside (for example, with reference to patent documentation 1).
Figure 15 is the overall structure figure of the past case of motor drive.This motor drive is in the past prevented diode D1 ~ D3, is had motor, high-voltage dc power supply 101, control power supply 102 and speed control unit 103 formations of motor driven winding L 1 ~ L3, rotor 109 by control circuit 104, power switch component 105, adverse current.Voltage VDC to power switch component 105 inputs from high-voltage dc power supply 101 (high voltage) output.Prevent that by adverse current diode D1 from reaching from the running command signal VSP of speed control unit 103 (low-voltage) output to prevent diode D2 by adverse current from the voltage VCC that controls power supply 102 (low-voltage) output to control circuit 104 inputs.In addition, the rate signal FG that constitutes motor of control circuit 104 prevents that by adverse current diode D3 from outputing to speed control unit 103 (low-voltage).
Figure 16 is illustrated in this motor drive in the past the situation that is caused having occured between the control power supply (VCC) of high-tension high-voltage dc power supply output (VDC) and low-voltage and speed control unit short circuit by the destroyed grade of motor drive circuit 106.As shown in figure 16, adverse current prevent diode D1 ~ D3 constitute when this short circuit has occured with high voltage VDC be connected voltage VCC and be connected that to make high voltage VDC be negative electrode K side.At this, when being short-circuited, as shown in figure 16, prevent that to controlling power supply 102 and adverse current diode D1 from applying high voltage VDC between motor drive circuit 106 builtin voltage VDC and voltage VCC.Yet because the negative electrode K side that adverse current is prevented diode D1 applies high voltage VDC, so adverse current prevents that diode D1 is 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 that by adverse current diode D1 from applying high voltage VDC to controlling power supply 102, but when significantly descending as the impedance of the control power input terminal of the control circuit 104 of the load of controlling power supply 102 due to destroyed grade, become excessive from the fault current of controlling power supply 102.And, control power supply 102 and must continue the excessive electric current of output, therefore there is the problem that may destroy the inscape of controlling power supply 102.
The object of the invention is to, produce excessive fault current, cause controlling the situation that power supply breaks down thereby the load that prevents from controlling because motor drive circuit is destroyed power supply becomes Low ESR.
Patent documentation 1: TOHKEMY 2007-110867 communique
Summary of the invention
Motor drive of the present invention is characterised in that to possess: inverter section, and it is transfused to from the voltage of controlling power supply, to provide electric power from main power source to the motor driven winding; And control part, it will be controlled power supply and produce to the power on signal of inverter section as electric power source, and wherein, circuit protecting element is arranged at the control power line is provided, and power supply is controlled in the protection when controlling the load short circuits of power supply of this circuit protecting element.
In addition, motor drive of the present invention is characterised in that to possess: main power source, and its output carries out with commercial ac power source the direct voltage that rectification smoothly obtains; And the control power supply, its lead-out terminal possesses transistor, the voltage lower than the voltage of main power source that output obtains from main power source by voltage conversion unit.Also possess: inverter section, it is transfused to from the voltage of controlling power supply as the function action power supply, to provide electric power from main power source to the motor driven winding; And control part, it will be controlled power supply and produce to the power on signal of inverter section as electric power source.And in motor drive of the present invention, the first resistance is arranged at from controlling power supply and provides line, the fault current that produces when any in this first resistance limits inverter section and control part is short-circuited to the electric power of inverter section.
Motor drive of the present invention can provide in the control power from the control power supply circuit protecting element, the first resistance are set on line; thus when inverter section and control part are short-circuited fault by circuit protecting element disengagement failure electric current, make destruction can not feed through to higher level equipment.
Description of drawings
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 the motor driven winding L
1, L
2, L
3Lead to electrically driven (operated) motor drive circuit 1 and as the main power source 4 of the power supply that direct current power is provided to motor drive circuit 1 with control 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 rotation, the standby motor driven winding L of having installed of above-mentioned electric tools
1, L
2, L
3Stator (not shown) and be configured to opposite with this stator and rotate rotor (not shown) freely.
In addition, this motor drive possesses output voltage V
DC Main power source 4 and output voltage V
CC Control 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 section 2 by mains electricity, and thus, inverter section 2 electric power of automatic power supply 4 in the future offers the motor driven winding L
1, L
2, L
3And; the output of controlling power supply 5 provides line 51 by controlling power; the circuit protecting element 12 of line 51 also is provided by being arranged at this control power, is connected with the control power input terminal Vc that the control power input terminal Vc of inverter section 2 is connected with control part respectively.Main power source 4 is with the motor driven winding L
1, L
2, L
3Energising drive to be the power supply that main purpose arranges, its power output capacity is made as larger, and with output voltage V
DCAlso be made as high voltage.On the other hand, controlling power supply 5 is power supplys that the function action of setting is used for the low-power circuits such as control circuit are moved, the little and output voltage V with main power source 4 phase specific power output capacity
CCIt is also low-voltage.For example, the specified output as the power supply of the air blast that is used in aircondition is made as voltage 140V, electric current 1A with main power source 4, on the other hand, will control power supply 5 and be made as voltage 15V, electric current 200mA.
In addition, be provided with control signal input terminal V in control part 3
SPWith these two interfaces of rotating signal lead-out terminal FG, be connected with the port of the microcomputer 6 of the outside that is positioned at motor drive circuit 1 respectively.Pass through control signal input terminal V from microcomputer 6
SPTo control part 3 indication rotary speeies, position of rotation.In addition, control part 3 is notified the rotary speed, the position of rotation that detect to microcomputer 6 by rotating signal lead-out terminal FG.
Fig. 2 is the action specification figure of the motor drive of embodiments of the present invention 1, and an example that is included in the action when being short-circuited fault in device 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 sides
CCIN, and from circuit protecting element 12 to control part 3 and the output voltage V of inverter section 2
CCOUTTemporal changes.
In Fig. 2, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, output voltage V
CC=V
CC0Be imported into inverter section 2 and control part 3 from controlling power supply 5 by circuit protecting element 12, make electric current I
CC=I
CC0Circulation.
Then, at moment t=t
1The time, the fault if at least one in inverter section 2 and control part 3 is short-circuited for a certain reason causes that by short circuit impedance descends, thus from the electric current I of controlling power supply 5
CCBecome electric current I as shown in Figure 2
CC=I
CC1, produce and to compare extremely large electric current when normal.Because of this current value I
CC1Electric current I
CCAnd at the inner Joule heat that produces of circuit protecting element 12, thus at moment t=t
2The time, circuit protecting element 12 broken strings make electric current I
CC=0, the current value when making fault is I
CC1Electric current I
CCBe cut off.That is, circuit protecting element 12 is to utilize the Joule heat that is produced by the electric current that flows through self to make the element that self melts, cuts off electric current, for example, is fuse, miniature fuse or fusing resistor.
In addition, at generation current I
CC=I
CC1Moment t=t
1~ t
2During this time, control power supply 5 output voltage, be the input voltage V of circuit protecting element 12
CCINBe declined to become the magnitude of voltage V in figure
CC1In addition, because causing impedance, the Joule heat by circuit protecting element 12 increases output voltage V
CCOUTBe down to magnitude of voltage V
CC1 'Afterwards, at moment t=t
2The time be 0.
Like this, even as inverter section 2, the control part 3 of the load of controlling power supply 5 fault that is short-circuited, this motor drive also can move and make circuit protecting element 12 disengagement failure electric currents.Therefore, according to present embodiment, can prevent from causing by this problem of load-side short circuit the situation that power supply breaks down of controlling.
And; in the situation that as the output of the control power supply 5 of the output of high-tension main power source 4 and low-voltage is short-circuited; in the structure of this motor drive, circuit protecting element 12 produces Joule heat owing to flowing into the electric current of controlling power supply 5 from high-tension main power source 4.And circuit protecting element 12 moves to make and cuts off this electric current.Therefore, according to present embodiment, can prevent from also that high voltage due to main power source 4 is continuously applied to control power supply 5 or large electric current flow into from main power source 4 the destroyed situation of structural element that power supply 5 is controlled power supply 5 of controlling.That is, according to present embodiment, can also prevent from causing by applying this problem of high voltage the situation that power supply breaks down of controlling.
As mentioned above, when motor drive of the present invention breaks down in motor drive circuit, by the large electric current that circuit protecting element comes the little control power supply of rupturing duty capacity to produce, therefore control power supply and be not destroyed.
In addition; also there is following methods: as circuit protecting element; when temperature rises due to the loss of fault current; using and to have in advance the PTC that becomes the characteristic of large impedance under certain temperature conditions (Positive Temperature Coefficient: positive temperature coefficient, be positive temperature characterisitic) thermistor, is minimum value with short-circuit current limitation when breaking down.
(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 and execution mode 1 similarly possess the motor driven winding L
1, L
2, L
3Lead to electrically driven (operated) motor drive circuit 1, microcomputer 6, main power source 4 and control power supply 5.In addition, in the present embodiment, constitute higher level equipment side electric base 9 and 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 of rectifier 10 and electrolytic capacitor 11, and it is to carrying out the level and smooth and output voltage V of output direct current of rectification from the alternating voltage as the source power supply 8 of commercial ac power source
DC Control power supply 5 by DC/DC transducer 13 and transistor Q as voltage conversion unit
0Consist of, output is from the output voltage V of main power source 4
DCThe voltage that obtains is lower than output voltage V
DCThe output voltage V of direct current
CCAs a concrete example, in the situation that Japan as source power supply 8, provides the alternating electromotive force of voltage 100V.So, from main power source 4 output output voltage V
DCThe direct voltage that is about 140V.In addition, in order to make the low-power circuit action, DC/DC transducer 13 is with this output voltage V that surpasses the high-voltage direct-current of 100V
DCBe converted to the output voltage V of the following low-voltage direct-current of 20V
CCAnd, from being arranged at the transistor Q of the outlet side of controlling power supply 5
0The output voltage V of emitter output LOW voltage direct current
CCIn addition, the structure of motor drive circuit 1 is identical with execution mode 1, and therefore description thereof is omitted.
Fig. 4 is the action specification figure of the motor drive of embodiments of the present invention 2, and an example that is included in the action when being short-circuited fault in device is shown.In Fig. 4, situation about also comprising when breaking down is shown in the interior electric current I of coming automatic power supply 4
DC, from the electric current I of controlling power supply 5
CC, circuit protecting element 12 the input voltage V of control power supply 5 sides
CCIN, from circuit protecting element 12 to control part 3 and the output voltage V of inverter section 2
CCOUTVariation.
In Fig. 4, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
DCBe imported into inverter section 2 from main power source 4, to the motor driven winding L
1, L
2, L
3Provide electric power, generation current value I
DC0Electric current I
DCAnd, output voltage V
CC=V
CC0Be imported into inverter section 2 and control part 3 from controlling power supply 5 by circuit protecting element 12, make electric current I
CC=I
CC0Circulation.
Then, at moment t=t
1The time, if cause for a certain reason inverter section 2 fault that is short-circuited, come the electric current I of automatic power supply 4
DCGeneration becomes current value I as shown in Figure 4
DC1Large electric current.Thus, fault feeds through to control power supply 5 sides or the control part 3 of inverter section 2, at moment t=t
11The time, about the transistor Q from control power supply 5
0Electric current I
CC, cause that by short circuit impedance descends, thereby make electric current I
CC=I
CC1, produce and to compare extremely large electric current when normal.Due to this current value I
CC1Electric current I
CCAnd at the inner Joule heat that produces of circuit protecting element 12, thus as moment t=t
21The time, circuit protecting element 12 broken strings make electric current I
CC=0, make the current value I when breaking down
CC1Electric current I
CCBe cut off.
In addition, at generation current I
CC=I
CC1Moment t=t
11~ t
21During this time, control power supply 5 output voltage, be the input voltage V of circuit protecting element 12
CCINBe declined to become the magnitude of voltage V in figure
CC1In addition, because causing impedance, the Joule heat by circuit protecting element 12 increases output voltage V
CCOUTBe down to magnitude of voltage V
CC1 'Afterwards, at moment t=t
21The time be 0.
On the other hand, electric current I
DCAt moment t=t
2The time, because the broken string of the broken string of inverter section 2 inside or not shown circuit block makes electric current I
DC=0.Enumerated in the drawings at moment t=t
2=t
11Situation under produced simultaneously example, but can be also the different moment.
As mentioned above, motor drive of the present invention by the large electric current that circuit protecting element comes the cutting-off controlling power supply to produce, is therefore controlled power supply and is not destroyed when motor drive circuit breaks down.In addition, with execution mode 1 similarly, also can prevent from controlling because the control power supply from high-tension main power source to low-voltage applies high voltage the problem that power supply breaks down by circuit protecting element.In addition, also have following methods: as circuit protecting element, using as described above the PTC thermistor, is minimum value with short-circuit current limitation when fault.
(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 and execution mode 2 similarly, by to the motor driven winding L
1, L
2, L
3Higher level equipment side electric base 9 formations of leading to electrically driven (operated) motor drive circuit 1 and possessing microcomputer 6, main power source 4 and control power supply 5.The motor drive of present embodiment is except the control power input terminal Vc of inverter section in motor drive circuit 12 is provided with resistance R as the first resistance
1In addition, other structure with the motor drive of execution mode 2 is identical, 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 that is included in the action when being short-circuited fault in device is shown.In Fig. 6, the electric current I of coming automatic power supply 4 of situation about also comprising when breaking down is shown
DC, flow to the electric current I of inverter section 2 from controlling power supply 5
CC (INV), flow to the electric current I of control part 3 from controlling power supply 5
CC (IC), both summation is electric current I
CC, circuit protecting element 12 the input voltage V of control power supply 5 sides
CCIN, and from circuit protecting element 12 to control part 3 and the output voltage V of inverter section 2
CCOUTVariation.
In Fig. 6, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
DCBe imported into inverter section 2 from main power source 4, to the motor driven winding L
1, L
2, L
3Provide electric power, generation current value I
DC0Electric current I
DCAnd, output voltage V
CC=V
CC0Be imported into inverter section 2 and control part 3 from controlling power supply 5 by circuit protecting element 12.Thus, current value I
CC (INV) 0Electric current I
CC (INV)Flow to inverter section 2, current value I
CC (IC) 0Electric current I
CC (IC)Flow to control part 3, and flow out electric current I from controlling power supply 5
CC=I
CC0=I
CC (INV) 0+ I
CC (IC) 0
Then, at moment t=t
1The time, if cause for a certain reason inverter section 2 fault that is short-circuited, come the electric current I of automatic power supply 4
DCProduce current value I as shown in Figure 6
DC1Large electric current.Thus, fault feeds through to control power supply 5 sides of inverter section 2, at moment t=t
11The time, about the transistor Q from control power supply 5
0Electric current I
CC (INV), cause that by short circuit impedance descends, thereby make electric current I
CC (INV)=I
CC (INV) 1, produce electric current larger when normal.Yet, pass through resistance R
1Make current value I
CC (INV) 1Value converge on transistor Q
0Allowed band in.Pass through current value I
CC (INV) 1Electric current I
CC (INV), make electric current I
CCIt is also current value I
CC1, produce electric current relatively large when normal.Due to this current value I
CC1Electric current I
CCAnd at the inner Joule heat that produces of circuit protecting element 12, thereby as moment t=t
21The time, circuit protecting element 12 broken strings make electric current I
CC=0, make the current value I when breaking down
CC1Electric current I
CCBe cut off.
In addition, producing short circuit current I
CC=I
CC1Moment t=t
11~ t
21During this time, control power supply 5 output voltage, be the input voltage V of circuit protecting element 12
CCINBe declined to become the magnitude of voltage V in figure
CC1, and the current value when breaking down is subject to resistance R
1Restriction, therefore to compare decline less with the current value of execution mode 2.In addition, because causing impedance, the Joule heat by circuit protecting element 12 increases output voltage V
CCOUTBe down to magnitude of voltage V
CC1 'Afterwards, at moment t=t
21The time be 0.
Preset resistance R
1Resistance value, make when breaking down the electric current I that produces
CCCurrent value for controlling the transistor Q of power supply 5
0Allowed band in value and enough make the value of circuit protecting element broken string.
On the other hand, electric current I
DCAt moment t=t
2The time, the broken string due to the broken string of inverter section 2 inside or not shown circuit block makes electric current I
DC=0.Enumerated in the drawings at moment t=t
2=t
11Situation under produced simultaneously example, but can be also the different moment.
In addition, as the resistance R of the first resistance
1Prepare when inverter section 2 is short-circuited fault, be arranged at the control power input terminal Vc side of inverter section 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 resistance R 1 can be set both.
As mentioned above, motor drive of the present invention passes through resistance R
1After controlling the higher limit of the electric current that power supply produces when being limited in motor drive circuit and breaking down, cut off electric current by circuit protecting element, therefore control power supply and be not destroyed.In addition, with execution mode 1 ~ 2 similarly, can also prevent that high voltage by main power source from causing that to control power supply destroyed.In addition, also have following methods: as circuit protecting element, using as described above the PTC thermistor, is minimum value with short-circuit current limitation when breaking down.
(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 and execution mode 2 ~ 3 similarly, by to the motor driven winding L
1, L
2, L
3Higher level equipment side electric base 9 formations of leading to electrically driven (operated) motor drive circuit 1 and possessing microcomputer 6, main power source 4 and control power supply 5.
In Fig. 7, inverter section 2 with switch element 16, high-voltage I C (representing take HVIC in the drawings) 15 and the power supply 14 of floating as the primary structure key element.The insulated gate electrode transistor npn npn Q that switch element 16 is connected by the totem pillar
1, Q
2, Q
3, Q
4, Q
5, Q
6Consist of.High-voltage I C 15 is configured to be used in the grid driving of switch element 16, to each transistor output signal of switch element 16.And, the power supply 14 of floating be arranged for producing in each transistor of switch element 16, main power source 4 sides are each transistor Q of upper arm side
1, Q
2, Q
3Grid voltage.In addition, the power supply 14 of floating constitutes by the resistance R as the first resistance
1With diode D
101, D
102, D
103The electric power that provides from controlling 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 that is included in the action when being short-circuited fault in device is shown.In Fig. 8, the electric current I of coming 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 15
CC (INV), flow to the electric current I of control part 3
CC (IC), the three summation be electric current I
CC, circuit protecting element 12 the input voltage V of control mains side
CCIN, and from circuit protecting element 12 to control part 3 and the output voltage V of inverter section 2
CCOUTVariation.
In Fig. 8, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
DCBe imported into inverter section 2 from main power source 4, to the motor driven winding L
1, L
2, L
3Provide electric power, generation current value I
DC0Electric current I
DCAnd, output voltage V
CC=V
CC0Be imported into the power supply 14 of floating, high-voltage I C 15 and control part 3 from controlling power supply 5 by circuit protecting element 12.Thus, current value I
CC (boot) 0Electric current I
CC (boot)The flow direction power supply 14 of floating, current value I
CC (INV) 0Electric current I
CC (INV)Flow to high-voltage I C 15, current value I
CC (IC) 0Electric current I
CC (IC)Flow to control part 3, and, flow out electric current I from controlling power supply 5
CC=I
CC0=I
CC (boot) 0+ I
CC (INV) 0+ I
CC (IC) 0
Then, at moment t=t
1The time, if cause for a certain reason the switch element 16 of motor drive circuit 1 fault that is short-circuited, come the electric current I of automatic power supply 4
DCProduce current value I as shown in Figure 8
DC1Large electric current.Thus, fault feeds through to the power supply 14 of floating, at moment t=t
11The time, about the transistor Q from control power supply 5
0Electric current I
CC (boot), cause that by short circuit impedance descends, thereby make electric current I
CC (boot)=I
CC (boot) 1, produce electric current larger when normal.Yet, pass through resistance R
1Make current value I
CC (boot) 1Value converge on transistor Q
0Allowed band in.Pass through current value I
CC (boot) 1Electric current I
CC (boot), electric current I
CCAlso become current value I
CC1, produce electric current relatively large when normal.Due to this current value I
CC1Electric current I
CCAnd at the inner Joule heat that produces of circuit protecting element 12, thereby as moment t=t
21The time, circuit protecting element 12 broken strings make electric current I
CC=0, make the large current value I when breaking down
CC1Electric current I
CCBe cut off.
In addition, producing short circuit current I
CC=I
CC1Moment t=t
11~ t
21During this time, control power supply 5 output voltage, be the input voltage V of circuit protecting element 12
CCINBe declined to become magnitude of voltage V
CC1, but the current value when breaking down is subject to resistance R
1Restriction, therefore to compare decline less with the current value of execution mode 2.In addition, because causing impedance, the Joule heat by circuit protecting element 12 increases output voltage V
CCOUTBe down to magnitude of voltage V
CC1 'Afterwards, at moment t=t
21The time be 0.
Preset resistance R
1Resistance value make when breaking down the electric current I that produces
CCCurrent value for controlling the transistor Q of power supply 5
0Allowed band in value and enough make the value of circuit protecting element broken string.
On the other hand, electric current I
DCAt moment t=t
2The time, the broken string due to the broken string of inverter section 2 inside or not shown circuit block makes electric current I
DC=0.In the drawings, enumerated at moment t=t
2=t
11Situation under produced simultaneously example, but can be also the different moment.
As mentioned above, motor drive of the present invention is passing through resistance R
1After the higher limit of the electric current that when the restrictions motor drive circuit breaks down, the control power supply produces, cut off electric current by circuit protecting element, therefore control power supply and be not destroyed.In addition, with execution mode 1 ~ 3 similarly, can also prevent that high voltage by main power source from causing that to control power supply destroyed.In addition, also have following methods: as circuit protecting element, using as described above the PTC thermistor, is minimum value with short-circuit current limitation when fault.
(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 and execution mode 2 ~ 4 similarly, by to the motor driven winding L
1, L
2, L
3Higher level equipment side electric base 9 formations of leading to electrically driven (operated) motor drive circuit 1 and possessing microcomputer 6, main power source 4 and control power supply 5.
The motor drive of present embodiment has the structure of the circuit protecting element 12 in the motor drive circuit 1 that has only omitted 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 that is included in the action when being short-circuited fault in device is shown.In Figure 10, the electric current I of coming automatic power supply 4 of situation about also comprising when breaking down is shown
DC, flow to the electric current I of inverter section 2 from controlling power supply 5
CC (INV), flow to the electric current I of control part 3
CC (IC), both summation is electric current I
CC, and the output voltage V of controlling power supply 5
CCVariation.
In Figure 10, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
DCBe imported into inverter section 2 from main power source 4, to the motor driven winding L
1, L
2, L
3Provide electric power, generation current value I
DC0Electric current I
DCAnd, output voltage V
CC=V
CC0From controlling power supply 5 outputs, be imported into inverter section 2 and control part 3.Thus, current value I
CC (INV) 0Electric current I
CC (INV)Flow to inverter section 2, current value I
CC (IC) 0Electric current I
CC (IC)Flow to control part 3, and flow out electric current I from controlling power supply 5
CC=I
CC0=I
CC (INV) 0+ I
CC (IC) 0
Then, at moment t=t
1The time, if cause for a certain reason the inverter section 2 of motor drive circuit 1 fault that is short-circuited, come the electric current I of automatic power supply 4
DCProduce current value I as shown in figure 10
DC1Large electric current.Thus, fault feeds through to control power supply 5 sides of inverter section 2, at moment t=t
11The time, about the transistor Q from control power supply 5
0Electric current I
CC (INV), cause that by short circuit impedance descends, thereby make electric current I
CC (INV)=I
CC (INV) 1, produce electric current larger when normal.Yet, by the resistance R as the first resistance
1Make current value I
CC (INV) 1Value converge on transistor Q
0Allowed band in.Pass through current value I
CC (INV) 1Electric current I
CC (INV), electric current I
CCAlso become current value I
CC1, produce electric current relatively large when normal, later on flow-thru electrode flow valuve I continuously
CC1Electric current I
CCCurrent value I
CC1Value larger when normal, but with respect to transistor Q
0Allowed band also have more than neededly, therefore can not affect the output voltage V of controlling power supply 5
CCMagnitude of voltage.
Preset resistance R
1Resistance value make electric current I when breaking down
CCEven 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
2The time, the broken string due to the broken string of inverter section 2 inside or not shown circuit block makes electric current I
DC=0.In the drawings, enumerated at moment t=t
2=t
11Situation under produced simultaneously example, but can be also the different moment.
Resistance R
1When being short-circuited fault, inverter section 2 prepares, be arranged at the control power input terminal Vc side of inverter section 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 resistance R 1 can be set both.
As mentioned above, motor drive of the present invention passes through resistance R
1Therefore the higher limit of the electric current that when the restrictions motor drive circuit breaks down, the control power supply produces is controlled power supply and is 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 and execution mode 2 ~ 5 similarly, by to the motor driven winding L
1, L
2, L
3Higher level equipment side electric base 9 formations of leading to electrically driven (operated) motor drive circuit 1 and possessing microcomputer 6, main power source 4 and control power supply 5.The motor drive of present embodiment has the structure of the circuit protecting element 12 in the motor drive circuit 1 that has only omitted 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 that is included in the action when being short-circuited fault in device is shown.In Figure 12, the electric current I of coming 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), flow to the electric current I of control part 3
CC (IC), the three summation be electric current I
CC, and the output voltage V of controlling power supply 5
CCVariation.
In Figure 12, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
DCBe imported into inverter section 2 from main power source 4, to the motor driven winding L
1, L
2, L
3Provide electric power, generation current value I
DC0Electric current I
DCAnd, from controlling power supply 5 output output voltage V
CC=V
CC0, current value I
CC (boot) 0Electric current I
CC (boot)The flow direction power supply 14 of floating, 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)Flow to control part 3, and flow out electric current I from controlling power supply 5
CC=I
CC0=I
CC (boot) 0+ I
CC (INV) 0+ I
CC (IC) 0
Then, at moment t=t
1The time, cause for a certain reason the switch element 16 of motor drive circuit 1 fault that is short-circuited, therefore come the electric current I of automatic power supply 4
DCProduce current value I as shown in figure 12
DC1Large electric current.Thus, fault feeds through to the power supply 14 of floating, at moment t=t
11The time, about the transistor Q from control power supply 5
0Electric current I
CC (boot), cause that by short circuit impedance descends, thereby make electric current I
CC (boot)=I
CC (boot) 1, produce electric current larger when normal.Yet, pass through resistance R
1Make current value I
CC (boot) 1Value converge on transistor Q
0Allowed band in.Pass through current value I
CC (boot) 1Electric current I
CC (boot), electric current I
CCAlso become current value I
CC1, produce electric current relatively large when normal.This current value I
CC1Electric current I
CCValue larger when normal, but with respect to transistor Q
0Allowed band also have more than neededly, therefore can not affect the output voltage V of controlling power supply 5
CCMagnitude of voltage.
Preset resistance R
1Resistance value make when breaking down the electric current I that produces
CCEven 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
2The time, the broken string due to the broken string of inverter section 2 inside or not shown circuit block makes electric current I
DC=0.In the drawings, enumerated at moment t=t
2=t
11Situation under produced simultaneously example, but can be also the different moment.
As mentioned above, motor drive of the present invention passes through resistance R
1Therefore the higher limit of the electric current that when the restrictions motor drive circuit breaks down, the control power supply produces is controlled power supply and is 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 and execution mode 2 ~ 6 similarly, by to the motor driven winding L
1, L
2, L
3Higher level equipment side electric base 9 formations of leading to electrically driven (operated) motor drive circuit 1 and possessing microcomputer 6, main power source 4 and control power supply 5.
The motor drive of present embodiment constitutes, and in the motor drive circuit 1 of execution mode 6, provides the resistance R that is provided as the second resistance on line 41 in the mains electricity of coming automatic power supply 4
2, circuit protecting element 12 is set and as the diode D of the first diode on line 51 providing from the control power of controlling power supply 5
1, diode D is set on control signal wire
2, and diode D is set on the 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 that is included in the action when being short-circuited fault in device is shown.In Figure 14, the electric current I of coming 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), flow to the electric current I of control part 3
CC (IC), the three summation be 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 sides
CCIN, and from circuit protecting element 12 to control part 3 and the output voltage V of inverter section 2
CCOUTVariation.
In Figure 14, current, at moment t=t
0The time, motor drive circuit 1 is in normal condition, the output voltage V of direct current
DCPass through resistance R from main power source 4
2Be imported into inverter section 2, to the motor driven winding L
1, L
2, L
3Provide electric power, generation current value I
DC0Electric current I
DCAnd, output voltage V
CC=V
CC0From controlling power supply 5 by circuit protecting element 12 and diode D
1To deduct diode D
1The mode of forward voltage VF be provided.By this output voltage V is provided
CC, current value I
CC (boot) 0Electric current I
CC (boot)The flow direction power supply 14 of floating, current value I
CC (INV) 0Electric current I
CC (INV)Flow to high-voltage I C 15, current value I
CC (IC) 0Electric current I
CC (IC)Flow to control part 3, and flow out electric current I from controlling power supply 5
CC=I
CC0=I
CC (boot) 0+ I
CC (INV) 0+ I
CC (IC) 0
Then, at moment t=t
1The time, if cause for a certain reason the switch element 16 of motor drive circuit 1 fault that is short-circuited, come the electric current I of automatic power supply 4
DCProduce current value I as shown in figure 14
DC1Large electric current.Thus, fault feeds through to high-voltage I C 15, control part 3, the power supply 14 of floating, thereby the diode D of line 51 is being provided from the control power of controlling power supply 5
1Negative electrode K side produce large magnitude of voltage V
DC0Voltage V
CC (D1K)Yet, diode D
1Be in reverse bias condition, therefore at diode D
1The anode A side do not produce high voltage.
Then, as moment t=t
2The time, resistance R
2Broken string, diode D
1The voltage of negative electrode K side also descend, make electric current I
DC=0.Then, at moment t=t
11The time, about the transistor Q from control power supply 5
0Electric current I
CC (boot), cause that by short circuit impedance descends, thereby make electric current I
CC (boot)=I
CC (boot) 1, produce electric current larger when normal.Yet, pass through resistance R
1Make current value I
CC (boot) 1Value converge on transistor Q
0Allowed band in.Pass through current value I
CC (boot) 1Electric current I
CC (boot), electric current I
CCAlso become current value I
CC1, produce electric current relatively large when normal.Due to this current value I
CC1Electric current I
CCAnd at the inner Joule heat that produces of circuit protecting element 12, thereby as moment t=t
21The time, circuit protecting element 12 broken strings make electric current I
CC=0, the large current value I when making fault
CC1Electric current I
CCBe cut off.
In addition, producing short circuit current I
CC=I
CC1Moment t=t
11~ t
21During this time, because causing impedance, the Joule heat by circuit protecting element 12 increases output voltage V
CCOUTBe down to magnitude of voltage V
CC1 'Afterwards, at moment t
21The time make output voltage V
CCOUT=0.
Preset resistance R
1Resistance value make when breaking down the electric current I that produces
CCCurrent value for controlling the transistor Q of power supply 5
0Allowed band in value and enough make the value of circuit protecting element broken string.
In addition, in the drawings, enumerated at moment t=t
2=t
11Situation under produced simultaneously example, but can be also the different moment.
In addition, diode D is set
2With diode D
3Purpose be, the short trouble that prevents switch element 16 feeds through to control part 3 and the port of microcomputer 6 is applied in excessive voltage, causes microcomputer 6 to break down.
As mentioned above, motor drive of the present invention passes through resistance R
1After the higher limit of the electric current that when the restrictions motor drive circuit breaks down, the control power supply produces, cut off electric current by circuit protecting element, therefore control power supply and be not destroyed.
In addition, also have following methods: as circuit protecting element, using as described above the PTC thermistor, is minimum value with short-circuit current limitation when breaking down.
Claims (14)
1. motor drive is characterized in that possessing:
Inverter section, it is transfused to from the voltage of controlling power supply, to provide electric power from main power source to the motor driven winding; And
Control part, it produces above-mentioned control power supply to the power on signal of above-mentioned inverter section as electric power source,
Wherein, circuit protecting element is arranged at the control power line is provided, and this circuit protecting element is protected above-mentioned control power supply when the load short circuits of above-mentioned control power supply.
2. motor drive according to claim 1, is characterized in that,
Above-mentioned main power source output carries out with commercial ac power source the direct voltage that rectification smoothly obtains,
The lead-out terminal of above-mentioned control power supply possesses transistor, the voltage lower than the voltage of main power source that output obtains from above-mentioned main power source by voltage conversion unit.
3. motor drive according to claim 2, is characterized in that,
The first resistance is arranged to the above-mentioned control power of above-mentioned inverter section line is provided, the fault current that produces during any short circuit in this first resistance limits above-mentioned inverter section and above-mentioned control part.
4. motor drive according to claim 2, is characterized in that,
The first resistance is arranged to the above-mentioned control power of above-mentioned control part line is provided, the fault current that produces during any short circuit in this first resistance limits above-mentioned inverter section and above-mentioned control part.
5. motor drive according to claim 2, is characterized in that,
The first resistance is arranged to the above-mentioned control power of above-mentioned inverter section and above-mentioned control part line is provided, the fault current that produces during any short circuit in this first resistance limits above-mentioned inverter section and above-mentioned control part.
6. motor drive according to claim 2, is characterized in that, also possesses:
The power supply of floating provides electric power from above-mentioned control power supply by this power supply of floating of a plurality of diode pairs; And
Switch element, it comprises the insulated gate transistor that is connected with above-mentioned main power source totem pillar,
Wherein, the grid that above-mentioned inverter section comprises insulated gate transistor drives the high-voltage I C of use,
The first resistance is arranged to the above-mentioned control power of the above-mentioned power supply of floating line is provided, the fault current that produces during any short circuit in this first resistance limits above-mentioned inverter section and above-mentioned control part.
7. motor drive according to claim 2, is characterized in that,
The second resistance is arranged at mains electricity line is provided, and the first diode is arranged at above-mentioned control power line is provided.
8. the described motor drive of any one according to claim 1 ~ 7, is characterized in that,
The foregoing circuit protection component is any in fuse, miniature fuse and fusing resistor.
9. the described motor drive of any one according to claim 1 ~ 7, is characterized in that,
The foregoing circuit protection component is positive temperature characteristic thermistor.
10. motor drive is characterized in that possessing:
Main power source, its output carries out with commercial ac power source the direct voltage that rectification smoothly obtains;
Control power supply, its lead-out terminal possesses transistor, the voltage lower than the voltage of main power source that output obtains from above-mentioned main power source by voltage conversion unit;
Inverter section, it is transfused to voltage from above-mentioned control power supply as the function action power supply, to provide electric power from above-mentioned main power source to the motor driven winding; And
Control part, it produces above-mentioned control power supply to the power on signal of above-mentioned inverter section as electric power source,
Wherein, the first resistance is arranged to the control power of above-mentioned inverter section line is provided, the fault current that produces during any short circuit in this first resistance limits above-mentioned inverter section and above-mentioned control part.
11. motor drive according to claim 10 is characterized in that,
Above-mentioned the first resistance is arranged to the above-mentioned control power of above-mentioned control part line is provided.
12. motor drive according to claim 10 is characterized in that,
Above-mentioned the first resistance is arranged to the above-mentioned control power that shares of above-mentioned inverter section and above-mentioned control part line is provided.
13. motor drive according to claim 10 is characterized in that, also possesses:
The power supply of floating provides electric power from above-mentioned control power supply by this power supply of floating of a plurality of diode pairs; And,
Switch element, it comprises the insulated gate transistor that is connected with above-mentioned main power source totem pillar,
Wherein, the grid that above-mentioned inverter section comprises insulated gate transistor drives the high-voltage I C of use,
Above-mentioned the first resistance is arranged to the above-mentioned control power of the above-mentioned power supply of floating line is provided.
14. the described motor drive of any one according to claim 10 ~ 13 is characterized in that,
The second resistance is arranged at mains electricity line is provided, and the first diode is arranged at above-mentioned control power line is provided.
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 |
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| Publication Number | Publication Date |
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| CN103095208B CN103095208B (en) | 2016-01-20 |
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| CN (1) | CN103095208B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024592A (en) * | 2014-04-25 | 2015-11-04 | 中山大洋电机股份有限公司 | BLDC motor fault state feedback method and application BLDC motor, air-conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10978987B2 (en) * | 2017-05-16 | 2021-04-13 | Panasonic Intellectual Property Management Co., Ltd. | Motor drive device |
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| US20060208687A1 (en) * | 2004-01-05 | 2006-09-21 | Matsushita Electric Industrial Co., Ltd. | Motor frive inverter control apparatus |
| JP2007110867A (en) * | 2005-10-17 | 2007-04-26 | Matsushita Electric Ind Co Ltd | Motor drive unit |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013099231A (en) | 2013-05-20 |
| CN103095208B (en) | 2016-01-20 |
| JP5533840B2 (en) | 2014-06-25 |
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