CN106961230A - Control device of electric motor - Google Patents
Control device of electric motor Download PDFInfo
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- CN106961230A CN106961230A CN201611048797.8A CN201611048797A CN106961230A CN 106961230 A CN106961230 A CN 106961230A CN 201611048797 A CN201611048797 A CN 201611048797A CN 106961230 A CN106961230 A CN 106961230A
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- motor
- resistance value
- insulating resistance
- voltage
- inverter
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- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims description 47
- 238000001514 detection method Methods 0.000 claims description 29
- 230000005611 electricity Effects 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000009499 grossing Methods 0.000 description 17
- 230000001681 protective effect Effects 0.000 description 15
- 238000004804 winding Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000008450 motivation Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002173 cutting fluid Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
-
- 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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention provides a kind of control device of electric motor, in the insulating resistance value of the special motors in measuring multiple motor, can not be influenceed and accurately measured the insulating resistance value of the motor of measurement object by the insulaion resistance reduction of the motor beyond measurement object.The control device of electric motor of the mode of the present invention, in the way of the motor (motor beyond measurement object) to not detecting insulating resistance value applies and is grounded idiostatic voltage, is instructed to inverter output voltage.
Description
Technical field
The present invention relates to control device of electric motor.
Background technology
Servomotor is driven by the control device of electric motor comprising inverter, is used on lathe etc..Lathe etc. is used
There is problems with the machinery that cutting fluid is processed.First, cutting fluid is attached on motor.Enter electricity moreover, also existing
Make the cutting fluid of the insulation degradation of motor inside motivation.When the insulation degradation of motor gradually aggravates, final motor ground.
After motor ground, electric leakage switch tripping or control device of electric motor are damaged, so as to occur system down.System down is to factory
Production line bring tremendous influence.Accordingly, it is considered to which preventive maintenance, can preferably detect the device of the insulating resistance value of motor.
The insulating resistance value for detecting motor has been recorded in Japanese Laid-Open Patent Publication 2015-169479
Technology.Disclose that " offer is not also influenceed by the leakage current of thyristor in high temperature and can accurately measured with document
The problem of the motor drive of the insulating resistance value of motor ", and disclose motor drive as described below
(with reference to summary).The motor drive possesses converter portion, power supply unit and multiple inverters.Inverter possesses company
It is connected on the upper arm switching element between capacitor and motor winding, and under being connected between capacitor and motor winding
Arm switch element.Direct current is converted to and exchanged by inverter by using these upper arm switching elements with underarm switch element, is driven
Move multiple motor.Moreover, the motor drive has：By the second switch of capacitor grounding；Measurement is in capacitor
The current detecting part of the electric current flowed between ground；Measure the voltage detection department of the voltage of capacitor；And insulaion resistance inspection
Survey portion.Insulaion resistance test section use the switching elements ON that the motor winding in measurement object connected, measurement object with
The current value and magnitude of voltage measured in the state for the switching elements ON that outer motor winding is connected, detects multiple motor
Insulating resistance value.
Japanese Laid-Open Patent Publication 2015-169479, describes the special motors measured in multiple motor
Insulating resistance value when situation.At this time, it may be necessary to the semiconductor switch not connected by the motor flowed through beyond measurement object
The influence of the leakage current of element, and accurately measure the insulating resistance value of motor.In same document, according to beyond measurement object
The thyristor of the underarm of inverter that is connected of motor connect in the state of the current value and magnitude of voltage that measure,
Detect the insulating resistance value of the motor of measurement object.
Current detecting part in Japanese Laid-Open Patent Publication 2015-169479, includes the partial pressure electricity being connected in series
Resistance and current sense resistor.Flowed through to suppress super-high-current in motor ground, the resistance value of the divider resistance is added
Big setting.During using these resistance detection electric currents, voltage is produced by these current sense resistors and divider resistance and declined.It is tied
Really, potential difference is produced between ground and the negative side terminal of capacitor.The inversion that motor beyond measurement object is connected
Under the thyristor on-state of the underarm of device, in the insulating resistance value reduction of the motor beyond measurement object,
The electric current of the insulaion resistance of the motor for the measurement object that circulates, is dropped by motor, the insulating resistance value beyond measurement object
Insulaion resistance after low, flows to the negative side terminal of capacitor.Therefore, the electric current for flowing through current sense resistor tails off.Therefore, survey
The part of the motor beyond measurement object may be flowed through than being higher by electric current originally by measuring the insulating resistance value of the motor of object.
The content of the invention
The present invention proposes to solve the above problems.It is an object of the present invention to provide following Motor Control dress
Put.The control device of electric motor in the insulating resistance value of the special motors in measuring multiple motor, can substantially not by
The influence of the insulating resistance value reduction of motor beyond measurement object, and accurately measure the insulated electro of the motor of measurement object
Resistance.
The present invention a mode control device of electric motor, with to do not detect insulating resistance value motor (measurement pair
Motor as beyond) apply and be grounded the mode of idiostatic voltage, inverter output voltage is instructed.
According to the control device of electric motor of the mode of the present invention, the exhausted of motor beyond measurement object can be suppressed
The influence that the reduction of edge resistance value is brought.As a result, the insulating resistance value of the motor of measurement object can be measured accurately.
For example, control device of electric motor possesses the inverter that multiple motor are supplied with alternating electromotive force, and described in detection
The insulating resistance value test section of the insulating resistance value of multiple motor, the insulating resistance value test section is detecting the multiple electricity
During the insulating resistance value of the special motors in motivation, as the inverter when driving other motor to the inverter
The idiostatic voltage of current potential of the ground terminal of the voltage instruction of output, output and other motor.
Brief description of the drawings
Fig. 1 is the circuit diagram of control device of electric motor.
Description of reference numerals
100：Control device of electric motor
110：Rectification circuit
120：Smoothing capacity device
130：Insulating resistance value test section
140：First inverter
150：Second inverter
200：Three-phase alternating-current supply
300：Electromagnetic contactor
410：First motor
420：Second motor
Embodiment
In the following detailed description, for purposes of illustration, in order to provide to disclosed embodiment thoroughly
Understand, it is proposed that many concrete details.It may be evident, however, that one or more can be implemented on the premise of these details
Many embodiments.In the other cases, in order to simplify drawing, it is schematically shown that known construction and device.
<The circuit structure of control device of electric motor>
Fig. 1 is the circuit diagram of the control device of electric motor 100 of present embodiment.Control device of electric motor 100 is driving control
Make the device of multiple motor (being the first motor 410 and the second motor 420 in Fig. 1).Control device of electric motor 100 has
Standby rectification circuit 110, smoothing capacity device (smooth circuit) 120, insulating resistance value test section 130, the first inverter 140 and second
Inverter 150.
Control device of electric motor 100 connects three-phase alternating-current supply 200 via electromagnetic contactor 300.Rectification circuit 110 will be from
DC voltage is exported after the three-phase alternating voltage full-wave rectification that three-phase alternating-current supply 200 is supplied.Smoothing capacity device 120 is from rectification
The DC voltage smoothing that circuit 110 is exported.The positive side of the positive side bus of first inverter 140 and the second inverter 150 is female
Line, all positive terminal with smoothing capacity device 120 are connected.The minus side bus of first inverter 140 and the second inverter 150
Minus side bus, all negative terminal with smoothing capacity device 120 are connected.
Insulating resistance value test section 130 is the function part of the resistance value for the insulaion resistance that each motor of detection possesses.Absolutely
Edge resistance value test section 130 possesses voltage detection department 131, current sense resistor (first resistor) 132 (resistance value R1), protection electricity
Relay, Yi Jijian between resistance (second resistance) 133 (resistance value R2), connection current sense resistor 132 and protective resistance 133
Survey control unit 134.Current sense resistor 132 is the resistance for detecting electric current.The resistance value of current sense resistor 132 is R1.
One end of current sense resistor 132, connects the minus side bus of the first inverter 140 and the minus side bus of the second inverter 150.
Protective resistance 133 is the resistance for suppressing to flow through super-high-current in any motor ground.The resistance value of protective resistance 133
For R2.One end of protective resistance 133 and the other end connection (can connect) of current sense resistor 132, and protective resistance 133
The other end is grounded.Voltage detection department 131 detects the both end voltage V of smoothing capacity device 120PN, and notify to detect control unit 134.Inspection
The action for surveying control unit 134 is aftermentioned.
First inverter 140 receives DC voltage from smoothing capacity device 120, and is converted into the alternating current of expected frequency
After pressure, exported to the first motor 410.So, 140 pair of first drive control of motor 410 of the first inverter.First inverter
140 possess the switch element 142 and PWM (Pulse Width being arranged in each phase of the first motor 410
Modulation circuit 141) is controlled.First inverter 140 is instructed according to the ON/OFF exported from pwm control circuit 141, control
Each switch element 142.So, the first inverter 140 exports desired voltage to the first motor 410.Second inverter 150
Similarly possess pwm control circuit 151 and switch element 152, and using these to the drive control of the second motor 420.
Control device of electric motor 100 connects electromagnetic contactor 300 in regular event.Then, control device of electric motor
100 control rotation position and the speed of the first motor 410 by the first inverter 140, and are controlled by the second inverter 150
Make rotation position and the speed of the second motor 420.
Control device of electric motor 100 is when detecting insulating resistance value, the interim control action stopped to whole motor, and
Cut off electromagnetic contactor 300 (disconnection).Detect that control unit 134 connects the relay of insulating resistance value test section 130, via electricity
Stream detection resistance 132 and protective resistance 133 are grounded the N poles of smoothing capacity device 120.Hereinafter, according to which motor detected
Insulating resistance value and point situation illustrate the action of insulating resistance value test section 130.
<Detect the action of insulating resistance value：Composite insulation resistance value>
Insulating resistance value test section 130 can also individually detect the insulating resistance value of each motor.But, it is considered to operation is imitated
Rate, user can preferably hold the exception for whether occurring insulaion resistance first, then by detecting the insulating resistance value of each motor
Determine abnormal position.Therefore, the insulating resistance value and second motor 420 of the first motor 410 of explanation detection first below
The step of combined resistance value (composite insulation resistance value) of insulating resistance value.Then, the insulaion resistance for detecting each motor is illustrated
The step of value.
Detect that control unit 134 provides pwm control circuit 141 first voltage instruction, and pwm control circuit 151 is carried
For second voltage instruction.So, detection control unit 134 carries out PWM drivings with certain duty to each inverter.Detect control unit
134 are controlled in the mutually the same mode of the voltage instruction of each phase.Each pwm control circuit is according to voltage instruction, to the first He
The three-phase of second motor exports common voltage instruction value.Each pwm control circuit refers to the common voltage of the three-phase of motor
Value and triangular wave is made to be compared, and according to the switch element of each inverter of comparative result driving.As a result, on motor winding
It is applied in the both end voltage of, smoothing capacity device 120 corresponding with PWM duty.Because the motor winding of three-phase is all applied
Plus identical voltage, so the first motor 410 and the second motor 420 do not rotate.
When the insulaion resistance deterioration of some motor, examined by the insulaion resistance of the deterioration, protective resistance 133 and electric current
The formation closed circuit of measuring resistance 132, electric current is flowed by these.Control unit 134 is detected by following formula (1), is obtained each
The composite insulation resistance value R of the insulating resistance value of motorM。VR1It is the both end voltage of current sense resistor 132.DUTY is each
The duty of pwm control circuit.When the voltage in switch element declines greatly to the degree that can not be ignored, the V from formula (1)PNSubtract
Go and the corresponding value of voltage decline.
RM=VPN×DUTY/VR1×R1-R1-R2 (1)
The composite insulation resistance value that insulating resistance value test section 130 is obtained, the device held to such as user is sent.With
Infer the insulaion resistance deterioration of some motor, it is desirable to insulating resistance value test section 130 when composite insulation resistance value is relatively low in family
Detect the insulating resistance value of each motor.
<Detect the action of insulating resistance value：The insulating resistance value of first motor 410>
Detect that control unit 134, when detecting the insulating resistance value of the first motor 410, one is provided to pwm control circuit 141
Fixed voltage instruction.So, detection control unit 134 carries out PWM drivings with certain duty to the first inverter 140.So,
One motor 410 is driven.During the insulation degradation of the first motor 410, by the insulaion resistance deteriorated, protective resistance 133 and electricity
The formation closed circuit of detection resistance 132 is flowed, electric current is flowed by these.
(2) are calculated between ground connection E and the negative terminal of smoothing capacity device 120 detection control unit 134 according to the following equation
Voltage VEN.The voltage V that detection control unit 134 is calculatedENAs second voltage instruction, there is provided (driven to pwm control circuit 151
Second inverter 150 of dynamic the second motor 420 for not detecting insulating resistance value).So, the full three-phase of the second motor 420
Motor winding on, be applied in and be grounded idiostatic voltage.As a result, insulation of the electric current without flow through the second motor 420
Resistance.In addition, the VENCan also be the idiostatic voltage of current potential with the ground terminal of the second motor 420.
VEN=(R1+R2)/R1 × VR1 (2)
So, both end voltage V of the control unit 134 according to current sense resistor 132 is detectedR1, and current sense resistor 132
Resistance value R1 and protective resistance 133 resistance value R2 ratio, between the negative terminal and the ground connection that calculate smoothing capacity device 120
Current potential, and using it is described calculate result and instructed as second voltage exported to pwm control circuit 151.
In addition, detection control unit 134 can be according to the both end voltage V of current sense resistor 132R1, and current detecting electricity
The resistance value R1 of resistance 132 is with the resistance value R2 sums of protective resistance 133 relative to the resistance value R1's of current sense resistor 132
Than calculating the current potential between the negative terminal of smoothing capacity device 120 and ground connection, and the result that calculates is referred to as second voltage
Make to pwm control circuit 151 and exporting.
Detect that control unit 134 measures the both end voltage V of current sense resistor 132R1.Detect control unit 134 using smooth electricity
The DC voltage V of container 120PNAnd the both end voltage V of current sense resistor 132R1, the first electricity is obtained according to following formula (3)
The insulating resistance value R of motivation 410M1。
RM1=VPN×DUTY/VR1×R1-R1-R2 (3)
So, both end voltage V of the control unit 134 according to smoothing capacity device 120 is detectedPN, current sense resistor 132 two ends
Voltage VR1, current sense resistor 132 resistance value R1 and the resistance value R2 of protective resistance 133, calculate the first motor 410
Insulating resistance value.
The insulating resistance value that insulating resistance value test section 130 is obtained, the device held to such as user is sent.User exists
When the insulating resistance value of first motor 410 is relatively low, for example, by changing the first motor 410, suppression results from earth fault
System down.
In addition, pwm control circuit 151 can also detect the exhausted of first motor in insulating resistance value test section 130
During edge resistance value, instructed according to second voltage to the three-phase of the second motor and export common voltage instruction value.
<Detect the action of insulating resistance value：The insulating resistance value of second motor 420>
Detect that control unit 134, when detecting the insulating resistance value of the second motor 420, one is provided to pwm control circuit 151
Fixed voltage instruction.So, detection control unit 134 carries out PWM drivings with certain duty to the second inverter 150.So,
Two motor 420 are driven.During the insulation degradation of the second motor 420, by the insulaion resistance deteriorated, protective resistance 133 and electricity
The formation closed circuit of detection resistance 132 is flowed, electric current is flowed by these.
Detection control unit 134 calculates voltage V according to above-mentioned formula (2)EN(and the ground terminal of the first motor 410 is same
The voltage of current potential).The voltage V that detection control unit 134 is calculatedENAs first voltage instruction, there is provided to pwm control circuit 141
(the first inverter 140 for driving the first motor 410 for not detecting insulating resistance value).So, the first motor 410 is complete
On the motor winding of three-phase, idiostatic voltage is applied in and is grounded.As a result, electric current is without flow through the first motor 410
Insulaion resistance.In addition, the VENCan also be the idiostatic voltage of current potential with the ground terminal of the first motor 410.
So, both end voltage V of the control unit 134 according to current sense resistor 132 is detectedR1, and current sense resistor 132
Resistance value R1 and protective resistance 133 resistance value R2 ratio, between the negative terminal and the ground connection that calculate smoothing capacity device 120
Current potential, and using it is described calculate result and instructed as first voltage exported to pwm control circuit 141.
Detect that control unit 134 measures the both end voltage V of current sense resistor 132R1.Detect control unit 134 using smooth electricity
The DC voltage V of container 120PNAnd the both end voltage V of current sense resistor 132R1, the second electricity is obtained according to following formula (4)
The insulating resistance value R of motivation 420M2。
RM2=VPN×DUTY/VR1×R1-R1-R2 (4)
So, both end voltage V of the control unit 134 according to smoothing capacity device 120 is detectedPN, current sense resistor 132 two ends
Voltage VR1, current sense resistor 132 resistance value R1 and the resistance value R2 of protective resistance 133, calculate the second motor 420
Insulating resistance value.
The insulating resistance value that insulating resistance value test section 130 is obtained, the device held to such as user is sent.User exists
When the insulating resistance value of second motor 420 is relatively low, for example, by changing the second motor 420, suppression results from earth fault
System down.
In addition, pwm control circuit 141 can also detect the exhausted of second motor in insulating resistance value test section 130
During edge resistance value, instructed according to first voltage to the three-phase of the first motor and export common voltage instruction value.
<The summary of the present invention>
As described above, special motors of the control device of electric motor 100 of the present invention in multiple motor are measured is exhausted
During edge resistance value, even if motor ground, it can also suppress to flow through excessive electric current.In addition, complete to the motor winding of three-phase
Portion applies identical voltage.Therefore, it is possible to suppress the testing result of insulating resistance value because of the induced voltage of the motor of rotation by
To influence, it is possible to accurately detect insulating resistance value.
<On variation>
The invention is not restricted to above-mentioned embodiment, various modifications example is included.For example, to readily appreciate the present invention, it is right
Above-mentioned embodiment is illustrated.Above-mentioned embodiment not necessarily possesses whole components (structure) of explanation.
Above-mentioned embodiment illustrates the situation that motor is 2.Motor be more than 3 when similarly, Ke Yiying
With the structure of the present invention.That is, the inverter offer of motor and connecing for motor by not detecting insulating resistance value to driving
The idiostatic voltage instruction of ground terminal, it is possible to achieve and above-mentioned same action.
That is, the control device of electric motor of an embodiment of the disclosure, can be following control device of electric motor.Institute
State control device of electric motor and possess the inverter that multiple motor are supplied with alternating electromotive force；And the multiple motor of detection
The insulating resistance value test section of insulating resistance value, the insulating resistance value test section is specific in the multiple motor is detected
During the insulating resistance value of motor, the voltage exported as the inverter when driving other motor to the inverter refers to
The idiostatic voltage of current potential of the ground terminal of order, output and other motor.
Above-mentioned embodiment uses three-phase alternating-current supply 200.But, can be using single instead of three-phase alternating-current supply 200
Cross streams power supply.Moreover, instead of electromagnetic contactor 300, other alternating-current switch can be used.As rectification circuit 110, it can adopt
The circuit that can be regenerated with opposed powers such as PWM converters.Now, when detecting insulating resistance value, PWM converter also stops.In addition,
, can be using dc sources such as batteries instead of AC power.Now, when detecting insulating resistance value, it is not necessary to disconnect electromagnetic touch
Device 300.
Detection control unit 134 can not detect the phase in the three-phase of the inverter of the motor of insulating resistance value to driving
Or two-phase carries out PWM drivings.
Above-mentioned embodiment illustrates the example that threephase motor is driven by three-phase inverter.In single-phase inverter driving
, similarly can be using structure of the invention during single-phase motor.
Instead of current sense resistor 132, insulating resistance value test section 130 can possess the detection electric current such as Hall sensor
Equipment.Now, detection control unit 134 can calculate V using the voltage of protective resistance 133EN。
Detection control unit 134 is realized as detecting the hardware such as the circuit arrangement of function of control unit 134 and being arranged on
On control device of electric motor 100.Or, it is also used as performing the processor for the software for being used to realize equal function and being arranged on
On control device of electric motor 100.
The insulating resistance value obtained by insulating resistance value test section 130, for example, can also be notified by being shown on picture
User, can also send as data via appropriate communication line.Or, insulating resistance value can also be to represent insulating resistance value
The mode of electric signal etc. exported via appropriate lead-out terminal.Control device of electric motor 100 can possess and insulating resistance value
The way of output is corresponding, suitable output section for exporting the insulating resistance value detected by insulating resistance value test section 130
(display, communication line and lead-out terminal etc.).
In addition, when detection control unit 134 detects the insulating resistance value of the first motor 410, may be controlled to make the first electricity
The voltage instruction of each phase of motivation is mutually the same.Pwm control circuit 141 can be by the common voltage instruction of three-phase and triangular wave ratio
Compared with according to the switch element 142 of comparative result the first inverter 140 of driving.The duty with PWM can be applied on motor winding
Corresponding, smoothing capacity device 120 both end voltage.Now, because the motor winding of three-phase is all applied in identical voltage, institute
Also do not rotated with the first motor 410 even if being driven.
Moreover, when detection control unit 134 detects the insulating resistance value of the second motor 420, may be controlled to make each phase
Voltage instruction is mutually the same.Pwm control circuit 151 can be by three-phase common voltage instruction and triangle wave, according to comparing
As a result the switch element 152 of the second inverter 150 is driven.It can apply corresponding, smooth with PWM duty on motor winding
The both end voltage of capacitor 120.Now, because the motor winding of three-phase is all applied in identical voltage, therefore second electronic
Machine 420 is not also rotated even if being driven.
Embodiment of the present disclosure, can be the following first~the 8th control device of electric motor.
First control device of electric motor, is the control device of electric motor of the motor of drive control first and second, is possessed pair
First and second motor supplies the inverter of alternating electromotive force, and detects the insulated electro of first and second motor
The insulaion resistance test section of resistance, the insulaion resistance test section is used as institute when detecting the insulaion resistance of second motor
First voltage when stating the first motor described in Driven by inverter for the inverter is instructed, and exports first motor
After the current potential of ground terminal, the insulaion resistance of second motor is detected, the insulaion resistance test section is detecting described the
During the insulaion resistance of one motor, the second electricity described in the Driven by inverter during the second motor for the inverter is used as
After pressure instruction, the current potential for the ground terminal for exporting second motor, the insulaion resistance of first motor is detected.
Second control device of electric motor is on the basis of the first control device of electric motor, and the control device of electric motor is further
Possess the smooth circuit that alternating electromotive force is converted to direct current power and supplied to the inverter, the smooth circuit and described inverse
Become device and connect common bus respectively, the insulaion resistance test section, will when detecting the insulaion resistance of first motor
After difference between the negative busbar current potential and ground potential of the smooth circuit is as second voltage instruction output, described the is detected
The insulaion resistance of one motor, the insulaion resistance test section, will be described when detecting the insulaion resistance of second motor
After difference between the negative busbar current potential and ground potential of smooth circuit is exported as first voltage instruction, second electricity is detected
The insulaion resistance of motivation.
Three-motor control device is on the basis of the second control device of electric motor, and the insulaion resistance test section possesses
One and second resistance, one end of the first resistor is connected to the negative busbar of the smooth circuit and the inverter, described
One end of two resistance is connected with the other end of the first resistor, and the other end ground connection of the second resistance, the insulation
Resistance detection portion is when detecting the insulaion resistance of first motor, and measurement is by driving first motor described
The both end voltage that the two ends of first resistor are produced, and using the both end voltage calculate the smooth circuit negative busbar current potential and
Difference between ground potential, the insulaion resistance test section is when detecting the insulaion resistance of second motor, and measurement is by driving
The both end voltage moved second motor and produced at the two ends of the first resistor, and institute is calculated using the both end voltage
State the difference between the negative busbar current potential of smooth circuit and ground potential.
4th control device of electric motor is on the basis of three-motor control device, and the insulaion resistance test section is according to institute
State the both end voltage of first resistor, and the first resistor resistance value and the second resistance resistance value ratio, calculate
Difference between the negative busbar current potential and ground potential of the smooth circuit, and result is calculated as the described first or second electricity described in
Pressure instruction output.
5th control device of electric motor is on the basis of the 4th control device of electric motor, and the insulaion resistance test section is according to institute
State both end voltage, the both end voltage of the first resistor, the resistance value of the first resistor and second electricity of smooth circuit
The resistance value of resistance, calculates the insulaion resistance of the described first or second motor.
6th control device of electric motor is on the basis of the first control device of electric motor, and first and second motor is three
Phase ac motor, the control device of electric motor possesses the control circuit instructed to the inverter output voltage, the control
It is right during circuit processed detects the insulaion resistance of any one party of the described first or second motor in the insulaion resistance test section
The three-phase of the opposing party of described first or second motor all exports identical voltage instruction value.
7th control device of electric motor is on the basis of the 6th control device of electric motor, and the control circuit is in the insulated electro
During hindering the combined resistance that test section detects the insulaion resistance of first motor and the insulaion resistance of second motor,
Identical voltage instruction value is all exported to the three-phase of first motor, and it is all defeated to the three-phase of second motor
Go out identical voltage instruction value.
8th control device of electric motor is on the basis of the first control device of electric motor, and the control device of electric motor possesses use
In the output section for the insulating resistance value for exporting the insulaion resistance test section detection.
The detailed description is had been presented for for purposes of illustration and description.According to teaching above, many deformations
All it is possible with changing.Described detailed description is not without omitting or is intended to limit the theme described herein.Although
The theme is illustrated with distinctive architectural feature and/or procedure by word, but it is to be understood that,
Theme defined in claims is not necessarily limited to described specific features or detailed process.More precisely, will
Described specific features and detailed process are illustrated as the example for implementing claims.
Claims (9)
1. a kind of control device of electric motor, it is characterised in that including：
Multiple motor are supplied with the inverter of alternating electromotive force；And
The insulating resistance value test section of the insulating resistance value of the multiple motor is detected,
During the insulating resistance value of special motors of the insulating resistance value test section in the multiple motor of detection, as
The voltage instruction exported during other motor of the Driven by inverter to the inverter, output connects with other motor
The idiostatic voltage of current potential of ground terminal.
2. control device of electric motor according to claim 1, it is characterised in that
The multiple motor includes the first and second motor,
The inverter supplies alternating electromotive force to first and second motor,
The insulating resistance value test section detects the insulating resistance value of first and second motor,
The insulating resistance value test section,
When detecting the insulating resistance value of second motor, as described in the Driven by inverter during the first motor to institute
State the first voltage instruction of the voltage instruction of inverter output, output and the same electricity of current potential of the ground terminal of first motor
The voltage of position,
When detecting the insulating resistance value of first motor, as described in the Driven by inverter during the second motor to institute
State the second voltage instruction of the voltage instruction of inverter output, output and the same electricity of current potential of the ground terminal of second motor
The voltage of position.
3. control device of electric motor according to claim 2, it is characterised in that
The smooth circuit that alternating electromotive force is converted to direct current power and supplied to the inverter is also equipped with,
The positive terminal of the smooth circuit and the inverter positive side bus connection, the negative terminal of the smooth circuit and
The minus side bus connection of the inverter,
The insulating resistance value test section,
When detecting the insulating resistance value of first motor, the electricity between the negative terminal of the smooth circuit and ground connection
Position instructs as the second voltage and exported,
When detecting the insulating resistance value of second motor, the electricity between the negative terminal of the smooth circuit and ground connection
Position instructs as the first voltage and exported.
4. control device of electric motor according to claim 3, it is characterised in that
The insulating resistance value test section possesses first resistor and second resistance,
One end of the first resistor is connected with the minus side bus of the inverter,
One end of the second resistance is connected with the other end of the first resistor, and another termination of the second resistance
Ground,
The insulating resistance value test section is when detecting the insulating resistance value of first motor, and measurement is by driving described the
One motor and the both end voltage produced at the two ends of the first resistor, and the smooth electricity is calculated using the both end voltage
Current potential between the negative terminal on road and ground connection,
The insulating resistance value test section is when detecting the insulating resistance value of second motor, and measurement is by driving described the
Two motor and the both end voltage produced at the two ends of the first resistor, and the smooth electricity is calculated using the both end voltage
Current potential between the negative terminal on road and ground connection.
5. control device of electric motor according to claim 4, it is characterised in that the insulating resistance value test section is according to institute
State the both end voltage of first resistor, and the resistance value and the resistance value of the second resistance of the first resistor ratio, calculate
Current potential between the negative terminal of the smooth circuit and ground connection, and instructed result is calculated as described first or second voltage
Output.
6. control device of electric motor according to claim 5, it is characterised in that the insulating resistance value test section is according to institute
State the both end voltage, the both end voltage of the first resistor, the resistance value of the first resistor and described second of smooth circuit
The resistance value of resistance, calculates the insulating resistance value of the described first or second motor.
7. control device of electric motor according to claim 2, it is characterised in that
First and second motor is three-phase alternating-current motor,
The inverter possesses control circuit,
The control circuit detects the exhausted of any one party of the described first or second motor in the insulating resistance value test section
During edge resistance value, according to the voltage instruction, the three-phase output to the opposing party of the described first or second motor is common
Voltage instruction value.
8. control device of electric motor according to claim 7, it is characterised in that the control circuit is in the insulaion resistance
It is worth the composite insulation that test section detects the insulating resistance value of first motor and the insulating resistance value of second motor
During resistance value, common voltage instruction value is exported to the three-phase of first motor, and to second motor
Three-phase exports common voltage instruction value.
9. the control device of electric motor according to any one in claim 1~8, it is characterised in that the motor control
Device processed is also equipped with the output section of the insulating resistance value for exporting the insulating resistance value test section detection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015237987A JP6480316B2 (en) | 2015-12-04 | 2015-12-04 | Motor control device |
| JP2015-237987 | 2015-12-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106961230A true CN106961230A (en) | 2017-07-18 |
| CN106961230B CN106961230B (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611048797.8A Expired - Fee Related CN106961230B (en) | 2015-12-04 | 2016-11-23 | Motor control device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6480316B2 (en) |
| CN (1) | CN106961230B (en) |
| PH (1) | PH12016000446A1 (en) |
| TW (1) | TWI717424B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112352376A (en) * | 2019-06-07 | 2021-02-09 | 宇菱塑胶科技有限公司 | Motor driving device |
| CN113138308A (en) * | 2020-01-17 | 2021-07-20 | 宝山钢铁股份有限公司 | Remote real-time monitoring system for insulation state of roller way motor in IT power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6851932B2 (en) * | 2017-08-01 | 2021-03-31 | 株式会社 東京ウエルズ | Route selection system |
| JP7092620B2 (en) * | 2018-08-31 | 2022-06-28 | 株式会社日立産機システム | Power conversion system and motor control method |
| JP7364871B2 (en) * | 2018-09-27 | 2023-10-19 | ミツミ電機株式会社 | Motor control circuit and motor control device |
| JP7258654B2 (en) * | 2019-05-23 | 2023-04-17 | 東芝キヤリア株式会社 | Circuit board for motor drive and motor drive |
| JP7191807B2 (en) * | 2019-11-29 | 2022-12-19 | 株式会社日立製作所 | Diagnostic device and diagnostic method |
| JP7489293B2 (en) * | 2020-11-02 | 2024-05-23 | オークマ株式会社 | Inverter device with motor insulation inspection function |
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- 2016-11-23 CN CN201611048797.8A patent/CN106961230B/en not_active Expired - Fee Related
- 2016-11-29 PH PH12016000446A patent/PH12016000446A1/en unknown
- 2016-11-30 TW TW105139478A patent/TWI717424B/en not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6480316B2 (en) | 2019-03-06 |
| PH12016000446A1 (en) | 2018-06-04 |
| TW201721166A (en) | 2017-06-16 |
| TWI717424B (en) | 2021-02-01 |
| CN106961230B (en) | 2022-04-19 |
| JP2017103993A (en) | 2017-06-08 |
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