CN103580556B - The insulation degradation detection method of control device of electric motor and motor - Google Patents
The insulation degradation detection method of control device of electric motor and motor Download PDFInfo
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- CN103580556B CN103580556B CN201310325466.4A CN201310325466A CN103580556B CN 103580556 B CN103580556 B CN 103580556B CN 201310325466 A CN201310325466 A CN 201310325466A CN 103580556 B CN103580556 B CN 103580556B
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- 238000001514 detection method Methods 0.000 title claims abstract description 170
- 238000009413 insulation Methods 0.000 title claims abstract description 49
- 230000015556 catabolic process Effects 0.000 title claims abstract description 40
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 40
- 238000004804 winding Methods 0.000 claims description 51
- 238000009499 grossing Methods 0.000 claims description 28
- 239000004065 semiconductor Substances 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 23
- 230000001681 protective effect Effects 0.000 claims description 14
- 238000007689 inspection Methods 0.000 claims description 7
- 241000406668 Loxodonta cyclotis Species 0.000 claims 1
- 239000004020 conductor Substances 0.000 claims 1
- 230000005283 ground state Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 27
- 230000008450 motivation Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000002173 cutting fluid Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000018199 S phase Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The insulation degradation detection method of control device of electric motor and motor.Detection operation control part is when the detection of insulaion resistance of motor (M1) instruction is received, breaker (130) is disconnected, the separating switch (148-1) of inverter circuit (140-1) is closed, the separating switch (148-2) of inverter circuit (140-2) is disconnected, by detection switch (155) closure to form insulaion resistance detection current path, then repeat switch action：Make the pwm signal of the high level of the pwm signal, (100-A) % dutycycles of low level upset in mark of same time to the pwm signal of the first drive circuit (145) output A% dutycycles, to the second drive circuit (147) output, so that a square crystal pipe (TR1-TR3) of bridge arm circuit (150A-150C) to be connected and the opposing party's transistor (TR4-TR6) is disconnected, thereafter, a square crystal pipe (TR1-TR3) is disconnected and connects the opposing party's transistor (TR4-TR6).Insulaion resistance test section detects the insulaion resistance (R1i) of motor (M1) using the voltage between terminals of resistor (160).
Description
Technical field
The present invention relates to the insulation of the control device of electric motor and motor of the insulation degradation detection function that possesses motor
Degradation detection.
Background technology
Generally, servomotor is connected with control device of electric motor, by the PWM inversions being arranged in control device of electric motor
Device is driven.Servomotor is used by the production equipment headed by lathe mostly.There is side to supply cutting in lathe
Liquid side processes the machinery of workpiece.In the machinery using cutting fluid, cutting fluid can be attached to servomotor, the cutting fluid of attachment
The inside of servomotor is penetrated into, the insulation of servomotor is gradually degraded.
When the insulation degradation of servomotor, the insulaion resistance between winding and the earth in servomotor just subtracts
It is small, ultimately result in winding and the earth is electrically connected, until ground connection.When ground connection is produced, RCCB will be made to trip, or make electricity
Motivation control device is damaged, so as to the system failure occur.The generation of the system failure can make the production line of factory force to stop, so
Very big infringement can be brought to the production of factory.
At present, from from the viewpoint of preventive maintenance maintenance, with following cry, i.e. before ground connection, expect
Device with the insulation degradation that can easily detect servomotor.Particularly, in the multiaxis using many servomotors
In the factory of lathe, the device of the insulation degradation that can respectively detect servomotor is urgently desired to have.
As the existing method of the insulation degradation of detection servomotor, typically with following three kinds of methods：
(1) using the method for insulating-resistance meter
The method is that the side of the insulaion resistance between the winding of servomotor and the earth is directly read by insulating-resistance meter
Method.
(2) using the method for the voltage between the circuit and the earth of PWM inverter
The method is the method for the invention recorded using following patent documents 1.Concisely say to be exactly following method,
That is, between the positive pole of PWM inverter and negative pole both sides or any pole and the earth, it is connected with and connects capacitor and resistor in series
The circuit for connecing, by the voltage at detection resistance device two ends, carrys out computing insulaion resistance.
(3) method for utilizing the voltage between the circuit and the earth of the PWM inverter of non-powered state
The method is the method for the invention recorded using following patent documents 2.Concisely say to be exactly following method,
That is, resistor and switch are connected between the negative pole and the earth of the PWM inverter being connected with power supply via breaker, will be disconnected
Road device becomes off-state, and switch is closed, and the semiconductor switch of the positive pole of PWM inverter is become into conducting state, by inspection
The voltage at measuring resistance device two ends, carrys out computing insulaion resistance.The method difference is that and is not connected with having electricity in PWM inverter
Computing insulaion resistance in the state of source.
Patent document 1：Japanese Unexamined Patent Publication 2005-201669 publications
Patent document 2：Japanese Unexamined Patent Publication 2009-204600 publications
But, in the existing method of the insulation degradation of detection servomotor, there are the following problems.
In the case of using (1) method, in order to detect insulaion resistance, it is necessary to servomotor and motor control will be connected
The distribution of device processed is unloaded down, and the operation of insulating-resistance meter is then connected between the winding and the earth of servomotor.In order to
Detection insulaion resistance, the number of working processes number is excessive, is maintained as preventive maintenance, is unpractical.
Using in the case of (2) method, although need the decomposition of lathe unlike (1) method, but can cause through
The power supply of PWM inverter and leakage current is flowed in the circuit that capacitor and resistor in series are formed by connecting, so can not transport
Calculate correct insulaion resistance.
In the case of using (3) method, because being cut off power supply and PWM inverter by breaker, do not exist (2)
Problem as method.But, PWM inverter use boostrap circuit in the case of, from it is as described below the reasons why, it is impossible to
Using the method.
As shown in the inverter circuit of Fig. 6, boostrap circuit is the electricity by the use of capacitor 15 as the transistor 17 of the side of positive pole 16
The circuit in source.Boostrap circuit is connected with diode 13, electricity by being arranged on the power supply 12 of the side of negative pole 11 for PWM inverter 10
Resistance device 14, capacitor 15 and constitute.By the switching of the transistor 18 of the side of negative pole 11, the power supply 12 from the side of negative pole 11 is via electricity
Resistance device 14, diode 13, charge to capacitor 15.Therefore, capacitor 15 turns into the power supply of the transistor 17 of the side of positive pole 16.
It is thus impossible to connected when the transistor 17 of the side of positive pole 16 is become into normal, in the case where PWM inverter 10 is using boostrap circuit,
The detection of insulaion resistance can not be carried out.
Particularly, in the gang tool using many servomotors, inverter circuit as shown in Figure 6 is respectively for each
Servomotor is configured, and whole inverter circuits are connected in parallel.In which case it is desirable to respective servo electricity can be detected
The insulaion resistance of motivation, but from it is above-mentioned the reasons why, it is impossible to detect the insulaion resistance of respective servomotor.
The content of the invention
The present invention is created, its purpose to solve the problem points of the existing method of detection insulation degradation as described above
It is, there is provided the insulation degradation detection method of a kind of control device of electric motor and motor, even if it has boostrap circuit, also can
It is enough easily to detect insulaion resistance, the state of the insulation degradation of multiple motor can be correctly grasped respectively.
Control device of electric motor of the invention for realizing above-mentioned purpose has breaker, multiple inverter circuits, detection
Switch, resistor, detection operation control part, insulaion resistance test section.Each inverter circuit have switch portion, the first drive circuit,
Second drive circuit, separating switch.
The connection that breaker will be provided with the rectification circuit and AC power of smoothing capacity device disconnects.Multiple inverter circuits with it is flat
Sliding capacitor is connected in parallel, and drives in multiple motor respectively.
The switch portion that each inverter circuit has is by multiple bridge arm circuit (ア ー system loops) it is connected in parallel, and by the plurality of bridge
Arm circuit is connected in parallel with smoothing capacity device, and be connected in series for a pair of semiconductor switch by the bridge arm circuit, and and one half are led
Body switchs mutual connecting line and is connected with the winding of motor.
The first drive circuit that each inverter circuit has to a pair of semiconductor switch of bridge arm circuit in bootstrapping electricity
The one method, semiconductor switch on road is driven.A pair of semiconductors of the second drive circuit that each inverter circuit has to bridge arm circuit
The opposing party's semiconductor switch in switch is driven.
The separating switch that each inverter circuit has will disconnect to the energization of boostrap circuit, by the first drive circuit and second
Drive circuit is separated.
Detection switch forms the bridge of the inverter circuit connected via the motor as detection object from smoothing capacity device
The semiconductor switch of arm circuit, the winding of motor, the insulaion resistance detection current path for greatly arriving smoothing capacity device.Resistance
Device is arranged in insulaion resistance detection current path between smoothing capacity device and the earth, and is connected in series with detection switch.
Detection operation control part disconnects breaker when the detection instruction to the insulaion resistance of motor is received, and
The separating switch of the inverter circuit that the motor for turning into detection object is connected becomes closure, on the other hand, will be as inspection
The separating switch of the whole inverter circuits beyond the inverter circuit that the motor of survey object is connected becomes to disconnect, and detection is opened
Pass becomes closure, so as to form insulaion resistance detection current path, then repeats following switch motion：To as inspection
Survey the pwm signal of the dutycycle of the first drive circuit output A% of the inverter circuit that is connected of motor of object, to inversion electricity
The second drive circuit output on road turns over the high level of the pwm signal, low level in mark of the same time (same タ イ ミ Application グ)
Then into (100-A) % dutycycle pwm signal, by least one bridge arm circuit of the switch portion of the inverter circuit
A pair of semiconductor switch in a side become on-state, and the opposing party is become into off-state, thereafter, by bridge arm electricity
A side in a pair of semiconductor switch on road becomes off-state, and the opposing party is become into on-state.Insulaion resistance test section
Using the voltage between terminals of resistor, the insulaion resistance of motor of the detection as detection object.
Insulation degradation detection method for realizing the motor of the invention of above-mentioned purpose utilizes control device of electric motor,
The control device of electric motor has breaker, multiple inverter circuits, detection switch, resistor, detection operation control part, insulation
Resistance detection portion, each inverter circuit has switch portion, the first drive circuit, the second drive circuit, separating switch.
The insulation degradation detection method of motor is comprising such as the next stage：Receive and the detection of the insulaion resistance of motor is referred to
Show；The connection of rectification circuit and AC power is disconnected by breaker, the inversion electricity that the motor of detection object is connected will be turned into
The separating switch on road becomes closure, so as to the first drive circuit and the second drive circuit be connected, on the other hand, will be as inspection
The separating switch of the whole inverter circuits beyond the inverter circuit of the motor connection for surveying object becomes to disconnect, so that will be to bootstrapping
The energization of circuit is disconnected, and the first drive circuit and the second drive circuit are separated, and by detection switch, forms insulaion resistance
Detection current path；Repeat following switch motion, and detection is passed in insulaion resistance detection current path
Electric current, the switch motion is：The first drive circuit output of the inverter circuit connected to the motor as detection object
The pwm signal of the dutycycle of A%, to the inverter circuit the second drive circuit output the same time mark make the PWM
The high level of signal, the pwm signal of the dutycycle of (100-A) % of low level upset, by the switch of the inverter circuit
A side in a pair of semiconductor switch of at least one bridge arm circuit in portion becomes on-state, and the opposing party is become to disconnect shape
State, thereafter, off-state is become by the side in a pair of semiconductor switch of the bridge arm circuit, and the opposing party is become to connect
State；The voltage of the resistor to being generated by detecting electric current to flow to resistor is detected；And according to the electricity for detecting
The size of pressure detects the insulaion resistance of the motor as detection object.
Invention effect
According to the present invention, even the control device of electric motor with boostrap circuit, it is also possible to easily detect insulaion resistance,
And can respectively properly grasp the state of the insulation degradation of multiple motor.
Brief description of the drawings
Fig. 1 is the pie graph of the control device of electric motor of present embodiment；
Fig. 2 (a) and Fig. 2 (b) are the figures of the action specification for the bridge arm circuit shown in Fig. 1；
Action flow chart when Fig. 3 is the insulaion resistance detection of the control device of electric motor shown in Fig. 1；
Fig. 4 is the figure of the action specification of the action flow chart for Fig. 3；
Fig. 5 is the figure of the action specification of the action flow chart for Fig. 3；
Fig. 6 is to represent the figure that the physical circuit of the boostrap circuit for being arranged at inverter circuit is constituted；
Symbol description
100 control device of electric motor
110 rectification circuits
120 AC powers (three-phase)
130 breakers
140-1,140-2 inverter circuit
145 first drive circuits
147 second drive circuits
148-1,148-2 separating switch
150A, 150B, 150C bridge arm circuit (switch portion)
152A, 152B, 152C connecting line
155 detection switch
160 resistors
165 protective resistors
170 detections act instruction unit
175 pwm control circuits
180 A/D converters
185 insulation degradations judge computer
C smoothing capacity devices
TR1-TR6 transistors
DPS dc sources
R0 resistance
D0 diodes
C0 capacitors
Specific embodiment
Below, to control device of electric motor of the invention and an implementation method of the insulation degradation detection method of motor
Illustrate.
(composition of control device of electric motor)
Fig. 1 is the pie graph of the control device of electric motor of present embodiment.As illustrated, the motor control of present embodiment
Device processed 100 can drive two motors M1, M2, and can respectively detect the insulaion resistance of two motors M1, M2.In profit
In the case of the insulaion resistance of motor M1, M2 being detected with the control device of electric motor of present embodiment, it is not necessary to which unloading turns into
The distribution of the motor of detection object, and will not be influenceed by the leakage current from power supply.In addition, it is as described below, even if by
The control device of electric motor of two axle compositions possesses boostrap circuit, it is also possible to respectively properly detect two insulated electros of motor
Resistance.
The motor that present embodiment is illustrated is three-phase alternating-current motor, and motor M1 has Y-connection R together
The winding W1r of phase, the winding W1s of S-phase, the winding W1t of T-phase.In drive motor M1, for example, to winding W1r, W1s, W1t
Pass to and staggered 120 ° of electric currents of phase with electrical angle.In addition, the insulaion resistance R1i of motor M1 is recited as equivalent circuit
Represent the resistance of the insulation between the neutral point and ground of winding W1r, W1s, W1t.When the resistance value of insulaion resistance R1i reach it is predetermined
Certain value below when, so that it may be judged as that the insulation of motor M1 is deteriorated.
Equally, motor M2 has the winding W2r of Y-connection R phases together, the winding W2s of S-phase, the winding of T-phase
W2t.It is same with motor M1 in drive motor M2, for example, winding W2r, W2s, W2t are passed to being staggered with electrical angle
120 ° of electric currents of phase.In addition, when the resistance value of the insulaion resistance R2i of motor M2 is reached below predetermined certain value,
Can be judged as that the insulation of motor M2 is deteriorated.
Control device of electric motor 100 has the rectification circuit 110 and AC power (three-phase) that will be provided with smoothing capacity device C
The breaker 130 that 120 connection disconnects.
As illustrated, rectification circuit 110 has bridge joint six diodes D1-D6, six diode D1-D6 together
Alternating current to coming from the stream of AC power 120 carries out full-wave rectification.Full-wave rectification has been carried out by six diode D1-D6
DC current is smoothed by smoothing capacity device C, and reduces the pulsation of the DC current after full-wave rectification.
When the insulaion resistance of motor M1 or M2 is detected, the contact of breaker 130 is separated, by the He of rectification circuit 110
The connection of AC power 120 disconnects.
Two inverter circuits 140-1 and 140-2 have been connected in parallel on rectification circuit 110.Inverter circuit 140-1
It is connected in parallel with smoothing capacity device C with 140-2, respectively drive motor M1, M2.The structure of inverter circuit 140-1 and 140-2
Into identical, therefore the composition of inverter 140-1 is illustrated as representing.
Inverter 140-1 has three bridge arm circuits 150A, 150B, 150C for constituting switch portion.
Be connected in series for a pair of transistor (semiconductor switch) TR1 and TR4 by bridge arm circuit 150A, in a pair of transistor TR1
The winding W1r of motor M1 is connected with connecting line 152A mutual with TR4.Bridge arm circuit 150B by a pair of transistor TR2 and
TR5 is connected in series, and the winding W1t of motor M1 is connected with the mutual connecting line 152B of a pair of transistor TR2 and TR5.Bridge
Be connected in series for a pair of transistor TR3 and TR6 by arm circuit 150C, on the mutual connecting line 152C of a pair of transistor TR3 and TR6
It is connected with the winding W1s of motor M1.
Three bridge arm circuits 150A, 150B, 150C (switch portion) and the smoothing capacity device C of rectification circuit 110 are connected in parallel.
Formed switch portion six transistors TR1, TR4, TR2, TR5, TR3, TR6 colelctor electrode-transmitting interpolar, it is counter to be connected with two
Pole pipe D.
Forming each bridge arm circuit 150A, 150B, a pair of transistor TR1, TR4 of 150C or TR2, TR5 or TR3, TR6
In, it is connected with by resistance R0, capacitor C0, diode D0 and dc source DPS on square crystal pipe TR1, TR2, a TR3 respectively
The boostrap circuit of composition.
Be connected with square crystal pipe TR1, TR2, the TR3 with boostrap circuit respectively driving transistor TR1, TR2,
First drive circuit 145 of TR3.
Forming each bridge arm circuit 150A, 150B, a pair of transistor TR1, TR4 of 150C or TR2, TR5 or TR3, TR6
In, second drive circuit of driving transistor TR4, TR5, TR6 is connected with transistor TR4, TR5, TR6 of the opposing party respectively
147。
First drive circuit 145 is configured respectively for each in transistor TR1, TR2, TR3.In addition, second drives
Dynamic circuit 147 is configured respectively for each in transistor TR4, TR5, TR6.
The boostrap circuit and driving crystal being driven to first drive circuit 145 of driving transistor TR1, TR2, TR3
Second drive circuit 147 of pipe TR4, TR5, TR6 is connected by separating switch 148-1.When separating switch 148-1 becomes disconnected
When opening, the boostrap circuit and the second drive circuit 147 of the first drive circuit 145 is driven just to separate.That is, as separating switch 148-1
When becoming to disconnect, just disconnected to the energization of boostrap circuit.Conversely, when separating switch 148-1 becomes closure, driving first to drive
The boostrap circuit of dynamic circuit 145 and the second drive circuit 147 are just connected, and can realize the energization to boostrap circuit.Therefore, electric capacity
Device C0 is electrically charged, the voltage that the first drive circuit 145 passes through capacitor C0, comes driving transistor TR1, TR2, TR3.
In addition, in the present embodiment, separating switch 148-1 is arranged between resistance R0 and dc source DPS, lead to
Cross and be set to separating switch 148-1 to disconnect, one separating switch 148-1 of cause is by the first drive circuit 145 of whole and entirely
Second drive circuit 147 in portion is concentrated and separated, but separating switch 148 can also be arranged on respective resistance R0 and capacitor C0 it
Between.
Resistor 160, a terminal and the general of the resistor 160 are connected with a terminal of detection switch 155
The line connection of the emitter stage connection of one end and transistor TR4, TR5, TR6 of smoothing capacity device C.In addition, in detection switch 155
One end of protective resistor 165 is connected with another terminal, the protective resistor 165 is in ground connection shape in motor M1 or M2
During state, overcurrent flows are prevented.The other end of protective resistor 165 is connected to ground.
When the insulaion resistance of motor M1 or M2 is detected, when detection switch 155 is closed, just formed it is following in appoint
A kind of insulaion resistance detection current path.
That is, when the insulaion resistance of motor M1 is detected, in inverter circuit 140-1, following insulaion resistance inspection is formed
Survey current path, i.e. from smoothing capacity device C, via the transistor TR1 of bridge arm circuit 150A, TR4, motor M1 winding
W1r, the transistor TR2 of bridge arm circuit 150B, TR5, the transistor TR3 of the winding W1t of motor M1 and bridge arm circuit 150C,
TR6, the winding W1s of motor M1 these three windings, by insulaion resistance R1i, from protective resistor 165, detection switch
155th, resistor 160 arrives smoothing capacity device C.
In addition, insulaion resistance detection current path can also be will not as described above via three windings but each warp
By winding it is following in any one path.
I.e., or following insulaion resistance detection current path, i.e. from smoothing capacity device C, by bridge arm circuit
The transistor TR1 of 150A, TR4, the winding W1r of motor M1, insulaion resistance R1i, then opened from protective resistor 165, detection
Close 155, resistor 160 and arrive smoothing capacity device C.Or can also be following insulaion resistance detection current path, i.e. from flat
Sliding capacitor C, by the transistor TR2 of bridge arm circuit 150B, TR5, the winding W1t of motor M1, insulaion resistance R1i, then
From protective resistor 165, detection switch 155, resistor 160 to smoothing capacity device C.Or can also be following insulaion resistance
Detection current path, i.e. from smoothing capacity device C, by the transistor TR3 of bridge arm circuit 150C, TR6, motor M1 around
Group W1s, insulaion resistance R1i, then from protective resistor 165, detection switch 155, resistor 160 to smoothing capacity device C.Separately
Outward, it is also possible to insulaion resistance detection electricity consumption is formed by any two bridge arm circuit (for example, bridge arm circuit 150A and 150C)
Flow path.
In addition, when the insulaion resistance of motor M2 is detected, in inverter circuit 140-2 sides, as described above, with any
Plant path and form insulaion resistance detection current path.
Breaker 130, separating switch 148-1,148-2, detection switch 155 act instruction unit 170 to drive by detection.
Detection operation control part 170 recognizes that its is examined when the detection of insulaion resistance of motor M1 or M2 instruction is received
Survey and indicate to be to indicate the detection of which motor.If the detection of insulaion resistance indicates the detection for being directed to motor M1 to refer to
Show, then as shown in figure 4, breaker 130 is become to disconnect, separating switch 148-1 is become into closure, by separating switch 148-2
Become to disconnect, while detection switch 155 is become into closure, so as in inverter circuit 140-1 sides, form above-mentioned insulaion resistance
Detection current path.
On the other hand, if the detection of insulaion resistance indicates the detection for being directed to motor M2 to indicate, by breaker 130
Become to disconnect, separating switch 148-1 is become to disconnect, separating switch 148-2 is become into closure, while by detection switch 155
Become closure, so as in inverter circuit 140-2 sides, form above-mentioned insulaion resistance detection current path.
Separating switch 148-1 and 148-2 will not simultaneously turn into closure, but indicate to be pin by the detection of insulaion resistance
The detection for being also directed to motor M2 to motor M1 indicates alternatively to be opened and closed.Therefore, formed in inverter circuit 140-1 sides
During insulaion resistance detection current path, can be influenceed by inverter circuit 140-2 sides, and be determined motor M1's
Insulaion resistance R1i.In addition, when inverter circuit 140-2 sides form insulaion resistance detection current path, can be subject to
The influence of inverter circuit 140-1 sides, and determine the insulaion resistance R2i of motor M2.
Pwm control circuit 175 receives to carry out the instruction of Autonomous test operation control part 170, is exported to the first drive circuit 145
The pwm signal of the dutycycle of A%, exported to the second drive circuit 147 makes the high level, low of pwm signal in mark of same time
The pwm signal of the dutycycle of (100-A) % of level upset.
Thus, repeat following switch motion, i.e. by least one bridge arm circuit of switch portion (for example, if
Three, then be bridge arm circuit 150A-150C) a pair of transistor in TR1, TR2, TR3 become on-state, and by crystal
Pipe TR4, TR5, TR6 become off-state, thereafter, transistor TR1, TR2, TR3 are become into off-state, and by transistor TR4,
TR5, TR6 become on-state.In addition, repeating following switch motion, i.e. by least one bridge arm circuit of switch portion
TR1 in a pair of transistor of (for example, if, then be bridge arm circuit 150A) becomes on-state, and by transistor
TR4 becomes off-state, thereafter, transistor TR1 is become into off-state, and transistor TR4 is become into on-state.
Pwm control circuit 175 can with make the phase of pulse consistent mode by the pwm signal of above-mentioned dutycycle synchronously
First drive circuit 145 and the second drive circuit 147 of bridge arm circuit 150A-150C are exported, and detects motor M1 or M2
Winding insulaion resistance.
In addition, pwm control circuit 175 can be by the pwm signal of above-mentioned dutycycle output to the first of bridge arm circuit 150A
The drive circuit 147 of drive circuit 145 and second, and detect the insulaion resistance of the winding W1r or winding W2r of motor M1 or M2.
Or, the first drive circuit 145 and second of the pwm signal of above-mentioned dutycycle output to bridge arm circuit 150B can be driven electricity
Road 147, and detect the insulaion resistance of the winding W1t or winding W2t of motor M1 or M2.Or, can be by above-mentioned dutycycle
Pwm signal output to bridge arm circuit 150C the first drive circuit 145 and the second drive circuit 147, and detect motor M1 or
The insulaion resistance of the winding W1s or winding W2s of M2.
In addition, pwm control circuit 175 can also be to any two bridge arm circuit (for example, bridge arm circuit 150A and 150C)
The first drive circuit 145 and the second drive circuit 147 synchronously with make the phase of pulse consistent mode while exporting above-mentioned
The pwm signal of dutycycle.
In addition, forming detection operation control part by detection action instruction unit 170 and pwm control circuit 175.
The value of 30%~70% scope is selected in output now to the dutycycle A of the pwm signal of the first drive circuit 145,
Make it possible to generation for insulaion resistance detection current path is passed to detection motor M1 or M2 insulaion resistance R1i or
The voltage of the electric current required for R2i, and the capacitor C0 of boostrap circuit can be charged to enter the switch of row transistor TR1 and move
The degree of work.
A/D converter 180 is connected between detection switch 155 and resistance 160.A/D converter 180 is by resistance 160
Voltage between terminals are converted to digital value.Insulation degradation being connected with A/D converter 180 and judging computer 185, the insulation is bad
Change the voltage between terminals for judging computer 185 according to the resistance 160 after digitlization, the insulaion resistance R1i of detection motor M1, M2
Or R2i, and using the value of the insulaion resistance for detecting, judge insulation degradation state.
In addition, judging that computer 185 forms insulaion resistance test section by A/D converter 180 and insulation degradation.
Fig. 2 (a) and Fig. 2 (b) are the figures of the action specification for the bridge arm circuit 150A shown in Fig. 1.As shown in Fig. 2 (a),
Boostrap circuit is connected with the transistor TR1 of bridge arm circuit 150A.
In boostrap circuit, separating switch 148-1 closure and transistor TR4 connect during, to by dc source DSP,
The closed circuit that resistance R0, diode D0, capacitor C0, transistor TR4 are constituted passes to electric current, by the electric current, capacitor C0
It is electrically charged.
The electric charge for being charged to capacitor C0 becomes the power supply for making the emitter-to-base voltage of transistor TR1 increase.It is logical
Cross the switching signal from the output of the first drive circuit 145, it can be ensured that the conducting state of transistor TR1.
Separating switch 148-1 turn into closure during, the pwm signal as shown in Fig. 2 (b) put on transistor TR1 with
TR4.Pwm signal 1 and pwm signal 2 are the signals of high level and the upset of low level state.Therefore, when pwm signal 1 is applied
It is added on transistor TR1 and when pwm signal 2 puts on transistor TR4, repeats following switch motion, i.e. transistor TR1
It is turned on, on the other hand, transistor TR4 turns into off-state, and thereafter, transistor TR1 becomes off-state, the opposing party
Face, transistor TR4 becomes on-state.
(action of control device of electric motor)
Then, the action to the control device of electric motor 100 shown in Fig. 1 is illustrated.Moved to detection insulaion resistance
Before illustrating, the first common action to drive motor M1, M2 is illustrated.
(generally action)
In the case of drive motor M1 and M2, detection action instruction unit 170 does not work, so breaker 130 such as Fig. 1
It is shown to become closure state.The voltage applied by AC power 120 is converted to direct current by rectification circuit 110, then supplies
To the inverter circuit 140-2 of the inverter circuit 140-1 and drive motor M2 of drive motor M1.In addition, generally acting
In, as shown in figure 1, separating switch 148-1 and 148-2 are closure states, detection switch 155 turns into off-state.
Pwm control circuit 175 is by the transistor TR1 and bridge arm of the bridge arm circuit 150A of inverter circuit 140-1 and 140-2
The transistor TR5 of circuit 150B is connected, and winding W1r, W1t to motor M1 pass to electric current, and to the winding of motor M2
W2r, W2t pass to electric current.Then, pwm control circuit 175 is by the crystalline substance of the bridge arm circuit 150B of inverter circuit 140-1 and 140-2
Body pipe TR2 is connected with the transistor TR6 of bridge arm circuit 150C, and winding W1t, the W1s to motor M1 pass to electric current, and to electronic
Winding W2t, W2s of machine M2 passes to electric current.Then, pwm control circuit 175 is electric by the bridge arm of inverter circuit 140-1 and 140-2
The transistor TR4 of the transistor TR3 and bridge arm circuit 150A of road 150C is connected, and winding W1s, the W1r to motor M1 pass to electricity
Stream, and winding W2s, W2r to motor M2 passes to electric current.
By the crystalline substance for repeating the bridge arm circuit 150A-150C that pwm control circuit 175 is realized according to above-mentioned order
The switch of body pipe TR1-TR6, passes to electric current so that motor come winding W1r-W1t, the W2r-W2t to motor M1, M2
M1, M2 are rotated.In the case where rotating speed is changed, the transistor TR1-TR6 to putting on bridge arm circuit 150A-150C
The dutycycle of pwm signal is changed.
The control above that pwm control circuit 175 is realized is based on the signal from the encoder for being installed on motor M1, M2
And carry out.In order to detect the rotation position of motor M1, M2, and positioned, and electricity is controlled by carrying out the signal of self-encoding encoder
The speed of motivation M1, M2.
(insulaion resistance detection action)
In addition to generally action as described above, when the insulaion resistance of motor M1 or M2 is detected, Motor Control dress
100 are put to act also as described below.
Action flow chart when Fig. 3 is the insulaion resistance detection of the control device of electric motor 100 shown in Fig. 1.The stream of action
Processing sequence shown in journey figure also illustrates that the order of the insulation degradation detection method of motor.
Reference picture 2 (a) and the treatment of Fig. 2 (b), Fig. 4, Fig. 5 to the action flow chart of Fig. 3 are illustrated.
Insulaion resistance detection action acts insulaion resistance of the instruction unit 170 from outside input motor M1 or M2 by detection
Detection indicate start.
When the detection that detection action instruction unit 170 is received externally insulaion resistance is indicated (S100), as shown in figure 4,
Breaker 130 is become off-state by detection action instruction unit 170 from closure state, rectification circuit 110 is departed from AC power
120(S101).Thus, not to inverter circuit 140-1 and 140-2 supply electric power, control device of electric motor 100 is acted from usual
It is transitioned into insulaion resistance detection action.In addition, in the detection of insulaion resistance is indicated, comprising the motor M1 as detection object
Or the information of M2.
The first stage of the treatment equivalent to insulation degradation detection method of step S100.
Detection acts the letter of the motor as detection object that instruction unit 170 indicates to be included from the detection of insulaion resistance
Breath, it is that the detection of which motor is indicated to recognize that its detection is indicated.Indicate to select to become disconnected by the detection for identifying
The separating switch 148-1 or 148-2 of open state, then become off-state by selected separating switch.
If for example, the detection of insulaion resistance indicates to be the detection instruction to motor M1, the inspection as insulaion resistance
The inverter circuit that the motor of survey object is connected is 140-1, so as shown in figure 4, detection action instruction unit 170 will only divide
Leave pass 148-1 and become closure state.That is, separating switch 148-1 maintains closure state, outside the detection object of insulaion resistance
The separating switch 148-2 of inverter circuit 140-2 that is connected of motor go off state from closure state.
The reasons why separating switch 148-2 is become into off-state be, just in case the insulaion resistance R2i of motor M2
In the case of decline, can cause electric current that resistance R0, two poles of boostrap circuit are passed through from the dc source DPS of inverter circuit 140-2
Pipe D0, capacitor C0, insulaion resistance R2i and flow.The electric current can cause the error detection of insulaion resistance R1i.
In addition, specifically, in the case where PWM drivings have been carried out to motor M1, for ground potential
Negative pole current potential will be influenceed and be fluctuated by pwm signal.Therefore, when negative pole current potential is higher than ground potential, electric current will be passed through
Insulaion resistance R2i and flow to resistor 160 and protective resistor 165.Thus, although to detect insulaion resistance P1i, but by exhausted
The influence of the electric current flowed in edge resistance P2i, the resistance value of insulaion resistance P1i is detected must be smaller than actual resistance.
Error detection in order to avoid more than, when the insulaion resistance of motor M1 is detected, separating switch 148-2 is become
Off-state.In addition, when the insulaion resistance of motor M2 is detected, separating switch 148-1 is become into off-state (S102).
Then, as shown in figure 4, detection switch 155 is become closure state (S103) by detection action instruction unit 170.
The second stage of the action equivalent to insulation degradation detection method of step S101~step S103.
The action that pwm control circuit 175 receives to come Autonomous test action instruction unit 170 is indicated, to inverter circuit 140-1's
The pwm signal of the dutycycle of the output of the first drive circuit 145 A% of bridge arm circuit 150A-150C.The PWM of the dutycycle of A%
Signal is the signal of the pulse type shown in the upside of Fig. 2 (b).In addition, when insulation degradation detection is acted the pwm signal that is used and
The pwm signal used during above-mentioned usual action is different.When insulation degradation detection is acted, detected using suitable insulation degradation
Pwm signal alone.
By the pwm signal, transistor TR1, TR2, TR3 carry out switch motion.The phase is connected in transistor TR1, TR2, TR3
Between, transistor TR4, TR5, TR6 disconnect, as shown in figure 4, electric current is passing through transistor TR1, motor M1 from smoothing capacity device C
Winding W1r and transistor TR2, the winding W1t of motor M1 and transistor TR3, the winding W1s of motor M1, insulaion resistance
The insulaion resistance detection current of R1i, the earth, protective resistor 165, detection switch 155, resistor 160 to smoothing capacity device C
Flowed in path.
On the other hand, pwm control circuit 175 receives to carry out the action instruction of Autonomous test action instruction unit 170, to inverter circuit
Second drive circuit 147 of the bridge arm circuit 150A-150C of 140-1 exports the pwm signal of the dutycycle of (100-A) %, institute
The pwm signal for stating the dutycycle of (100-A) % is will to export the pwm signal to the first drive circuit 145 in mark of same time
High level, low level upset pwm signal.The pwm signal of the dutycycle of (100-A) % is the downside institute of Fig. 2 (b)
The signal of the pulse type for showing.
By the pwm signal, transistor TR4, TR5, TR6 carry out switch motion.The phase is connected in transistor TR4, TR5, TR6
Between, transistor TR1, TR2, TR3 disconnect, as shown in figure 5, electric current is passing through resistance R0, capacitor C0, two from dc source DPS
Pole pipe D0, transistor TR4 flow in the boostrap circuit of dc source DPS.Capacitor C0 is charged by the electric current.Charge
The voltage of capacitor C0 afterwards carries out power supply during switch motion as transistor TR1, TR2, TR3 next time.
Alternatively, it is also possible to not make transistor TR1, TR2, TR3 and transistor TR4, TR5, TR6 replace as described above simultaneously
Ground switch, but make each bridge arm circuit 150A-150C transistor (for example, the transistor TR1 of bridge arm circuit 150A and
TR4) switched.
Therefore, by exporting the pwm signal to the first drive circuit 145 and the second drive circuit 147, transistor TR1,
TR2, TR3 and transistor TR4, TR5, TR6 alternately repeat switching.The time that transistor TR1, TR2, TR3 are connected is by exporting
The dutycycle of the pwm signal of the first drive circuit 145 is determined, so when the charging voltage for setting smoothing capacity device C is VDC
When, put on insulaion resistance R1i, protective resistor 165, the average voltage V of resistor 160 this series circuit and reform into V=
VDC × A/100 volts.
Therefore, when the detection electric current flowed in insulaion resistance detection current path is set into I, and by insulaion resistance
The resistance value of R1i is set to RR1i, the resistance value of protective resistor 165 is set to R165, is set to the resistance value of resistor 160
During R160,
I=V/ (RR1i+R165+R160)
=VDC × A/100 (RR1i+R165+R160) ampere.
Thus, the voltage between terminals V160 of resistor 160 is
V160=VDC × A × R160/100 (RR1i+R165+R160) volt.In addition, here, the winding of motor M1
The pressure drop of W1r, winding W1t, the combined resistance value of winding W1s and transistor TR1 is minimum, so ignoring.
The size of the voltage between terminals V160 of resistor 160 is proportional to the size RR1i of insulaion resistance R1i.Therefore, lead to
The size of the voltage between terminals V160 of detection resistance device 160 is crossed, the resistance value RR1i of insulaion resistance R1i can be learnt.
As described above, transistor TR1, TR2, TR3 are switched by the pwm signal of output to the first drive circuit 145.
The dutycycle of pwm signal is bigger, puts on the insulaion resistance of the winding W1r comprising motor M1, winding W1t, winding W1s
R1i, protective resistor 165, resistor 160 this series circuit average voltage V it is bigger, so being easily used for insulaion resistance
The detection of R1i.
On the other hand, the Time Dependent that transistor TR4, TR5, TR6 is connected is in the PWM of output to the first drive circuit 145
The dutycycle of signal.Because only during transistor TR4, TR5, TR6 are connected, electric current flows in boostrap circuit, so output
Dutycycle to the pwm signal of the first drive circuit 145 is bigger, and the charging interval of capacitor C0 is shorter, the voltage of capacitor C0
Rise smaller.
Therefore, the value of 30%~70% scope is selected in output to the dutycycle A of the pwm signal of the first drive circuit 145,
Make it possible to the electricity of electric current of the generation required for for passing to detection insulaion resistance R1i to insulaion resistance detection current path
Pressure, and the capacitor C0 of boostrap circuit can be charged to the degree of the switch motion that can enter row transistor TR1, TR2, TR3
(S104)。
Phase IIIs of the step S104 equivalent to insulation degradation detection method.
Then, 180 pairs of voltages of the resistor 160 generated by detecting electric current I to flow to resistor 160 of A/D converter
V160 carries out A/D conversions (S105).
Fourth stages of the step S105 equivalent to insulation degradation detection method.
Finally, insulation degradation judges voltage V160 of the computer 185 from after A/D conversions, the insulated electro of detection motor M1
Resistance RR1i (S106).It is monitored and feelings that insulating resistance value RR1i is declining in the insulating resistance value RR1i to detecting
Under condition, motor M1 is changed, the system failure caused by ground connection is prevented trouble before it happens.Alternatively, it is also possible to bad in insulation
Change the insulation that judging, the insulation degradation that motor is judged using the insulaion resistance of the motor for detecting is set on computer 185
Deterioration judging function.
Fiveth stages of the step S106 equivalent to insulation degradation detection method.
In above-mentioned insulaion resistance detection action, with make the phase of pulse consistent mode synchronously to inverter circuit
Bridge arm circuit 150A, 150B of 140-1 or 140-2,150C assign the pwm signal of same dutycycle, so electricity will not be made
Strong effect on the direction of motivation M1, M2 rotation, motor M1, M2 will not rotate.It is dynamic in insulation degradation detection conversely speaking,
When making, with the non-rotary mode of motor M1, M2 to each bridge arm circuit 150A, 150B of inverter circuit 140-1 or 140-2,
150C assigns the pwm signal of same dutycycle.
As described above, the control device of electric motor 100 according to present embodiment, by making the usual fortune of motor M1, M2
Turn to stop and breaker 130 is become into off-state, the insulaion resistance of motor M1, M2 can be determined.Therefore, there is no need to unload
The distribution of motor M1, M2, and in the measure of insulaion resistance, leakage current and the exchange flowed through power line will not be subject to
The influence of the noise of power supply.
In addition, in the detection of insulaion resistance, being determined using the dedicated resistor 160 being only powered in detection
Insulaion resistance.Therefore, the resistance value of insulaion resistance can be using the value of the detection for being adapted to insulaion resistance.Also, because so that arteries and veins
The consistent mode of the phase of punching synchronously (can also make the phase of pulse completely the same) each bridge arm circuit is assigned it is same
The pwm signal of dutycycle, so motor will not rotate.
In addition, only setting an insulaion resistance test section, it becomes possible to detect the insulaion resistance of multiple motor respectively.
It is additionally, since the position disconnected to the electric current of boostrap circuit being provided with into separating switch, and in the electricity of another axle
The separating switch is set to disconnection during the determination of insulation resistance of motivation, so constituting the situation of inverter circuit using bootstrap power supply
Under, even if the insulaion resistance of the motor being connected with the inverter circuit declines, it is also possible to the insulated electro of motor is correctly detected
Resistance.
In the above-described embodiment, to having a case that two inverter circuits illustrate, even if being have three
The control device of electric motor of inverter circuit more than platform, it is also possible to the thought of application the present application.In addition, to being arranged at inversion
The situation that the bridge arm circuit of circuit is provided with three is illustrated, even if being to be made up of the winding of motor and had for example
Six control device of electric motor of bridge arm circuit, it is also possible to the thought of application the present application.In addition, in above-mentioned implementation method
In, all have a case that boostrap circuit illustrate to whole inverter circuits, even if being that at least one inverter circuit possesses
The control device of electric motor of boostrap circuit, it is also possible to the thought of application the present application.In this case, possessing bootstrapping electricity
Separating switch is set on the inverter circuit on road.
Claims (9)
1. a kind of control device of electric motor, including：
Breaker, it disconnects the connection of AC power and the rectification circuit for possessing smoothing capacity device；
Multiple inverter circuits, it is connected in parallel each motor driven respectively in multiple motor with the smoothing capacity device,
Each inverter circuit has：
Switch portion, be connected in parallel for multiple bridge arm circuits by it, and the multiple bridge arm circuit is in parallel with the smoothing capacity device
Connection, be connected in series for a pair of semiconductor switch by the bridge arm circuit, and by the mutual connecting line of the pair of semiconductor switch
It is connected with the winding of motor；
With boostrap circuit semiconductor in first drive circuit, its a pair of semiconductor switch to the bridge arm circuit
Switch is driven；
Another semiconductor switch in second drive circuit, its a pair of semiconductor switch to the bridge arm circuit drives
It is dynamic；And
Separating switch, it will be disconnected to the energization of the boostrap circuit, and first drive circuit and described second are driven
Circuit is separated,
The control device of electric motor also has：
Detection switch, it is formed from the smoothing capacity device, flows through the inverter circuit that the motor as detection object is connected
The semiconductor switch of bridge arm circuit, the winding of the motor, the insulaion resistance detection that greatly reaches the smoothing capacity device use
Current path；
Resistor, it is arranged in the insulaion resistance detection current path between the smoothing capacity device and the earth, and
It is connected in series with the detection switch；
Detection operation control part, its receive the detection of the insulaion resistance of the motor is indicated when, by the breaker
The connection of the rectification circuit and the AC power is disconnected, the inverter circuit that the motor for turning into detection object is connected
Separating switch become closure and connected with by first drive circuit and second drive circuit, another aspect will turn into
The separating switch of the whole inverter circuits beyond the inverter circuit that the motor of detection object is connected becomes to disconnect with by described in
First drive circuit and second drive circuit are separated, and the detection switch is become into closure, so as to form insulaion resistance inspection
Survey current path, then repeats following switch motion：The inversion electricity connected to the motor as detection object
First drive circuit on road exports the pwm signal of the dutycycle of A%, is exported institute to the second drive circuit of the inverter circuit
The high level of pwm signal, the pwm signal of the dutycycle of (100-A) % that low level overturns in mark of same time are stated,
Become on-state with by the side in a pair of semiconductor switch of at least one bridge arm circuit of the switch portion of the inverter circuit,
And the opposing party is become into off-state, thereafter, the side in a pair of semiconductor switch of the bridge arm circuit is become to disconnect shape
State, and the opposing party is become into on-state；And
Insulaion resistance test section, it utilizes the insulaion resistance of the voltage between terminals detection motor of the resistor.
2. control device of electric motor as claimed in claim 1, wherein,
Export the value of the scope of the dutycycle A% selected 30%~70% of the pwm signal of first drive circuit so that energy
Enough electricity generated required for for passing to the insulaion resistance for detecting the motor to the insulaion resistance detection current path
The voltage of stream, and the switch of the semiconductor switch that the capacitor of the boostrap circuit can be charged into achievable one moves
The degree of work.
3. control device of electric motor as claimed in claim 1 or 2, wherein,
First drive circuit is respectively for a semiconductor switch in a pair of semiconductor switch for forming each bridge arm circuit
It is configured,
Second drive circuit is opened respectively for another semiconductor in a pair of semiconductor switch for forming each bridge arm circuit
Pass is configured,
The separating switch can intensively divide second drive circuit of whole first drive circuit and whole
From, and can be to the single switch of the position of the energization disconnection of the boostrap circuit as being arranged at.
4. control device of electric motor as claimed in claim 1 or 2, wherein,
The detection operation control part has following function：Indicated the detection to the insulaion resistance of the motor is received
When, recognize that the detection indicates the detection for being directed to which motor to indicate.
5. control device of electric motor as claimed in claim 1 or 2, wherein,
One end of the resistor is connected with a terminal of the detection switch, further in the another of the detection switch
Being connected with one terminal when the motor is in ground state prevents from being flowed in the insulaion resistance detection current path
One end of the protective resistor of dynamic overcurrent, the other end of the resistor is connected with the smoothing capacity device, the protection electricity
The other end for hindering device is connected with the earth.
6. control device of electric motor as claimed in claim 1 or 2, wherein,
The insulaion resistance test section also has insulation degradation decision-making function, and the insulation degradation decision-making function utilizes what is detected
The insulaion resistance of the motor judges the insulation degradation of the motor.
7. a kind of insulation degradation detection method of motor, it utilizes Motor Control according to claim 1 and 2 to fill
Put, wherein, the insulation degradation detection method of the motor was included with the next stage：
First stage：Receive and the detection of the insulaion resistance of the motor is indicated；
Second stage：The connection of the rectification circuit and the AC power is disconnected by the breaker, will be right as detecting
The separating switch of the inverter circuit that the motor of elephant is connected becomes closure, so that by first drive circuit and described second
Drive circuit is connected；On the other hand, the whole inversions electricity beyond the inverter circuit for the motor for turning into detection object being connected
The separating switch on road become disconnect, so as to will to the energization of the boostrap circuit disconnect, and will first drive circuit with
Second drive circuit is separated；Insulaion resistance detection current path is formed by the detection switch；
Phase III：Repeat following switch motion and pass to detection in the insulaion resistance detection current path
Electric current, the switch motion is：The first drive circuit output of the inverter circuit connected to the motor as detection object
The pwm signal of the dutycycle of A%, make the high level, low of the pwm signal to the second drive circuit output of the inverter circuit
The pwm signal of the dutycycle of (100-A) % that level overturns in mark of same time, by the switch of the inverter circuit
A side in a pair of semiconductor switch of at least one bridge arm circuit in portion becomes on-state, and the opposing party is become to disconnect shape
State, thereafter, off-state is become by the side in a pair of semiconductor switch of the bridge arm circuit, and the opposing party is become to connect
State；
Fourth stage：The voltage of the resistor to being flowed to the resistor and being generated by the detection electric current is detected；With
And
5th stage：Size according to the voltage for detecting detects the insulaion resistance of the motor as detection object.
8. the insulation degradation detection method of motor as claimed in claim 7, wherein,
In the phase III, the dutycycle A% selected 30%~70% of the pwm signal of output to first drive circuit
Scope value, enabling generate for passing to the exhausted of the detection motor to the insulaion resistance detection current path
The voltage of the electric current required for edge resistance, and the capacitor of the boostrap circuit can be charged to and can realize the half of one
The degree of the switch motion of conductor switch.
9. the insulation degradation detection method of motor as claimed in claim 7, wherein,
In the first stage,
Including recognizing the stage for detecting the instruction for indicating to be directed to which motor to the insulaion resistance of the motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012172334A JP5406345B1 (en) | 2012-08-02 | 2012-08-02 | Motor control apparatus and motor insulation deterioration detection method |
| JP2012-172334 | 2012-08-02 |
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| CN103580556A CN103580556A (en) | 2014-02-12 |
| CN103580556B true CN103580556B (en) | 2017-06-30 |
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| CN201310325466.4A Expired - Fee Related CN103580556B (en) | 2012-08-02 | 2013-07-30 | The insulation degradation detection method of control device of electric motor and motor |
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| Country | Link |
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| JP (1) | JP5406345B1 (en) |
| KR (1) | KR101810638B1 (en) |
| CN (1) | CN103580556B (en) |
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| JP6017481B2 (en) | 2014-03-05 | 2016-11-02 | ファナック株式会社 | Motor drive device having insulation resistance detection function and motor insulation resistance detection method |
| JP6480316B2 (en) * | 2015-12-04 | 2019-03-06 | 山洋電気株式会社 | Motor control device |
| JP6680648B2 (en) * | 2016-08-29 | 2020-04-15 | 山洋電気株式会社 | Motor control device |
| JP6673124B2 (en) * | 2016-09-29 | 2020-03-25 | ブラザー工業株式会社 | Motor driving device, computer program, and operation method of motor driving device |
| DE112018002164T5 (en) * | 2017-04-25 | 2020-01-09 | Nitto Kohki Co., Ltd. | ENGINE CONTROL DEVICE AND ELECTRIC TOOL |
| TWI677178B (en) * | 2017-06-27 | 2019-11-11 | 全漢企業股份有限公司 | Rectifier and associated rectifying circuit |
| CN110112960B (en) * | 2019-04-09 | 2020-05-19 | 华中科技大学 | Control system and method under double-motor multi-power bridge arm fault |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101385226A (en) * | 2006-03-16 | 2009-03-11 | 大金工业株式会社 | Multiphase load control method |
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| JP4053501B2 (en) * | 2004-01-13 | 2008-02-27 | ファナック株式会社 | Motor drive device |
| JP2008102096A (en) | 2006-10-20 | 2008-05-01 | Fanuc Ltd | Insulation resistance degradation detector of motor |
| JP5065192B2 (en) * | 2008-02-01 | 2012-10-31 | 山洋電気株式会社 | Motor control apparatus and motor insulation deterioration detection method |
| JP4644275B2 (en) | 2008-07-29 | 2011-03-02 | 日立オートモティブシステムズ株式会社 | Power converter and electric vehicle |
| JP4565036B2 (en) * | 2009-01-05 | 2010-10-20 | ファナック株式会社 | Motor insulation deterioration detector |
| CN102341714B (en) * | 2009-12-15 | 2016-01-20 | 株式会社Pues | Insulation-degradation detecting device |
| CN103003090B (en) * | 2010-07-14 | 2014-06-11 | 丰田自动车株式会社 | Controller for vehicle |
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2012
- 2012-08-02 JP JP2012172334A patent/JP5406345B1/en not_active Expired - Fee Related
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- 2013-07-24 TW TW102126478A patent/TWI584573B/en not_active IP Right Cessation
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|---|---|---|---|---|
| CN101385226A (en) * | 2006-03-16 | 2009-03-11 | 大金工业株式会社 | Multiphase load control method |
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| JP2014033527A (en) | 2014-02-20 |
| TW201414180A (en) | 2014-04-01 |
| KR101810638B1 (en) | 2017-12-19 |
| JP5406345B1 (en) | 2014-02-05 |
| KR20140018140A (en) | 2014-02-12 |
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| TWI584573B (en) | 2017-05-21 |
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