CN110112981A - Electric machine control system, method and electric appliance - Google Patents
Electric machine control system, method and electric appliance Download PDFInfo
- Publication number
- CN110112981A CN110112981A CN201910411031.9A CN201910411031A CN110112981A CN 110112981 A CN110112981 A CN 110112981A CN 201910411031 A CN201910411031 A CN 201910411031A CN 110112981 A CN110112981 A CN 110112981A
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- Prior art keywords
- motor
- current
- electric current
- instruction
- described instruction
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Classifications
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- 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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/18—Estimation of position or speed
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- 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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/12—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control
Abstract
The invention discloses a kind of electric machine control system, method and electric appliances, the system comprises main control module and motor drive module, the main control module, for sending the motor command electric current of setting to the motor drive module by pwm signal；The motor drive module, for going out described instruction electric current according to the duty ratio identification of the pwm signal, and driving motor is run to described instruction electric current.Using technical solution of the present invention, the communicating circuit of motor control can be simplified.
Description
Technical field
The present invention relates to Motor Control Field more particularly to a kind of electric machine control system, method and use the motor control
The electric appliance of system processed.
Background technique
Information exchange is carried out by connection between master control borad and driving plate during traditional motor control, in the method
Communicating circuit is complicated, and program code is more, for the system for not needing too many information exchange, is made using communicating circuit whole
A control system is excessively huge.
To information exchange, not high system mostly uses pulse voltage control mode (VSP), but drive module is needed to master control
The pulse voltage signal (VSP) of hair is sampled, if pulse voltage signal (VSP), which is interfered, will affect the accuracy of sampling
To influence the control effect of motor, and the electric current of motor is not known in the method master control, can not accurately control the revolving speed of motor.
For blower, it is unfavorable for carrying out permanent Boiler pressure control to the air quantity that motor exports.
Summary of the invention
The purpose of the present invention is in view of the above-mentioned drawbacks of the prior art, provide a kind of electric machine control system, method and
Electric appliance, the communicating circuit to solve circuit for controlling motor in the prior art is complicated and is easy using VSP control mode by dry
It disturbs and influences the technical issues of controlling precision.
In the embodiment of the present invention, a kind of electric machine control system is additionally provided comprising main control module and motor drive module,
The main control module, for sending the motor command electric current of setting to motor drive module by pwm signal；
The motor drive module, for going out described instruction electric current, and driving motor according to the duty ratio identification of the pwm signal
It runs to described instruction electric current.
In the embodiment of the present invention, described instruction electric current is the target electricity for the phase current setting in motor three-phase current
Flow valuve.
In the embodiment of the present invention, a kind of motor control method is additionally provided comprising:
Main control module sends the motor command electric current of setting to motor drive module by pwm signal；
Motor drive module goes out described instruction electric current according to the duty ratio identification of the pwm signal, and driving motor is run to institute
State instruction current.
In the embodiment of the present invention, motor drive module goes out described instruction electric current according to the duty ratio identification of the pwm signal,
Include:
The low and high level of pwm signal described in motor drive module real-time detection, and corresponding level is counted, according to one
The sum for counting high level in the period divided by high level and low level sum obtains the duty ratio of pwm signal, then further according to
Instruction current and the relation function of the pwm signal duty ratio obtain described instruction electric current.
In the embodiment of the present invention, motor drive module driving motor is run to described instruction electric current, comprising:
The current flow of real-time detection motor adjusts electricity according to the comparison of the current flow of motor and described instruction electric current
The revolving speed of machine,
When the current flow of motor is lower than described instruction electric current, the instruction revolving speed of motor is turned up；When the current flow of motor is high
When described instruction electric current, the instruction revolving speed of motor is turned down；When the current flow of motor is equal to described instruction electric current, electricity is maintained
The instruction revolving speed of machine is constant.
In the embodiment of the present invention, the revolving speed of motor is adjusted, comprising:
The three-phase current of motor and the current rotating speed of motor are obtained in real time；
It is generated according to the three-phase current of the current rotating speed of motor, the instruction revolving speed of motor and motor for controlling motor speed
Motor drive signal.
In the embodiment of the present invention, the motor drive module includes instruction current recognition unit, the identification of described instruction electric current
Low and high level of the unit for pwm signal described in real-time detection, and corresponding level is counted, according to a counting period
The sum of interior high level obtains the duty ratio of the pwm signal divided by high level and low level sum, then further according to instruction
Electric current and the relation function of the pwm signal duty ratio obtain described instruction electric current.
In the embodiment of the present invention, the motor drive module includes rotational speed regulation unit, and the rotational speed regulation unit is used for
The revolving speed that motor is adjusted according to the comparison of the current flow of motor and described instruction electric current, when the current flow of motor is low
When described instruction electric current, the instruction revolving speed of motor is turned up；When the current flow of motor is higher than described instruction electric current, electricity is turned down
The instruction revolving speed of machine；When the current flow of motor is equal to described instruction electric current, maintain the instruction revolving speed of motor constant.
In the embodiment of the present invention, the motor drive module further include:
Turn count unit, the current rotating speed for real-time estimation motor；
Motor drive signal generation unit, for current rotating speed, the three-phase electricity of the instruction revolving speed and motor of motor according to motor
Stream generates the motor drive signal for controlling motor speed.
In the embodiment of the present invention, a kind of electric appliance is additionally provided comprising above-mentioned electric machine control system.
Compared with prior art, electric machine control system of the invention and method, using main control module and motor driven mould
The motor command electric current for transmitting setting between block using pwm pulse signal, since motor is when stable, revolving speed and electricity
Stream is mutual corresponding relationship, without transmitting the motor speed of setting using dedicated communicating circuit, to reduce
The complexity of circuit；In addition, passing through the comparison between the running current of real-time detection motor and the instruction current of setting
It is adjusted come the instruction revolving speed to motor, the adjustment speed of motor speed can be accelerated, and improve the adjusting of motor speed
Precision；When the electric machine control system is applied to blower, since the revolving speed of motor can be accurately controlled, to be conducive to wind
The permanent Boiler pressure control of machine.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the electric machine control system of the embodiment of the present invention.
Fig. 2 is the flow chart that the instruction revolving speed of motor is adjusted in the embodiment of the present invention.
Fig. 3 is the flow chart of the motor control method of the embodiment of the present invention.
Specific embodiment
As shown in Fig. 2, in the embodiment of the present invention, providing a kind of electric machine control system in the embodiment of the present invention comprising
Main control module 1, motor drive module 2 and motor 3.
The main control module 1, the motor command electric current for that will set pass through PWM(Pulse Width Modulation,
Pulse width modulation) signal sends the motor drive module 2 to.It should be noted that described instruction electric current is to set
The target current value of motor operation, due to the timing of motor speed one, motor three-phase current be it is constant, therefore, can be by setting
The mode of the target current value of the phase current in motor three-phase current is determined to control the revolving speed of motor.
The principle that motor command electric current is transmitted by the pwm signal is as follows: one described instruction electric current of setting and institute
State the relation function of pwm signal duty ratio.The motor command electric current is transmitted by the pwm signal duty ratio.The pass
Be that function can need to be set according to specific, for example, in the relation function, described instruction electric current with it is described
Pwm signal duty ratio is proportional relationship:
I=F (p)=a × p, wherein I is described instruction electric current, and p is the duty ratio of the pwm signal, and a is the ratio system of setting
Number.
In the relation function, described instruction electric current and the pwm signal duty ratio can also be other linear passes
System:
I=F (p)=a × p+b, wherein a, b are the coefficient of setting.
It can according to actual needs, to set the relation function, in order to be transmitted by the pwm signal duty ratio
Described instruction electric current.
The motor drive module 2 for going out described instruction electric current according to the duty ratio identification of the pwm signal, and drives
Dynamic motor 3 is run to described instruction electric current.It is passed between the main control module 1 and motor drive module 2 using pwm pulse signal
The motor command electric current for passing setting, without transmitting the motor speed of setting using dedicated communicating circuit, to reduce
The complexity of circuit.
The motor drive module 2 includes instruction current recognition unit 21, rotational speed regulation unit 22, turn count unit 23
With motor drive signal generation unit 24.
Low and high level of the described instruction electric current recognition unit 21 for pwm signal described in real-time detection, and to corresponding electricity
Flat to be counted, the sum for counting high level in the period according to one obtains the PWM divided by high level and low level sum
Then the duty ratio of signal obtains described instruction electric current further according to the relation function of instruction current and the pwm signal duty ratio.
It should be noted that described instruction electric current and the relation function of the pwm signal duty ratio are set in advance in described instruction electric current
In recognition unit 21, described instruction electric current recognition unit 21 receives the pwm signal that the main control module 1 is sent, and calculates institute
The duty ratio of pwm signal is stated, instruction current can be calculated according to the relation function.
The rotational speed regulation unit 22 according to the comparison of the current flow of motor and described instruction electric current for adjusting
Save the revolving speed of motor 3.When the current flow of motor is lower than described instruction electric current, the instruction revolving speed of motor is turned up；When motor
When current flow is higher than described instruction electric current, the instruction revolving speed of motor is turned down；When the current flow of motor is equal to described instruction electricity
When stream, maintain the instruction revolving speed of motor constant.
Specifically, as shown in Fig. 2, when the absolute difference between the current flow ia and described instruction electric current i* of motor is small
Think that rotational speed regulation is completed when a certain thresholding i, present instruction revolving speed is final instruction revolving speed；As the current flow ia of motor
Rotational speed regulation does not complete when absolute difference between described instruction electric current i* is greater than a certain thresholding i, needs further to adjust
Instruct revolving speed.Increase on the basis of original rotary speed instruction n1 if the current flow ia of motor is less than described instruction electric current i*
N2, if actual current ia reduces n2 on the basis of original rotary speed instruction n1 when being greater than instruction current i*.Rotational speed regulation amount n2
It can suitably be adjusted according to the size of the difference between actual current ia and instruction current i*.
The turn count unit 23, the current rotating speed for real-time estimation motor.It should be noted that the revolving speed is estimated
The current rotating speed of motor can be estimated according to the current angular of rotor by calculating unit 23.
The motor drive signal generation unit 24, for according to the current rotating speed of motor, the instruction revolving speed of motor and electricity
The three-phase current of machine generates the motor drive signal for controlling motor speed.The motor drive signal generation unit 24 is raw
At motor drive signal, detailed process is as follows: the motor three-phase current that will test is converted to α β axis electricity by CLARK transformation
Stream, α β shaft current are converted to dq shaft current by PARK transformation.The current rotating speed n error amount of instruction revolving speed n* and motor does PI control
System output control electric current Is determines the control electric current id* and q axis control of d axis electric current iq*, d according to control electric current Is and estimated angle
Axis control electric current and the difference for passing through the d axis current flow id that Park changes adjust output d shaft voltage Vd, q axis by PI
Control electric current and the difference for passing through the q axis current flow iq that Park changes adjust output q shaft voltage Vq, Vd and Vq by PI
α shaft voltage V α and β shaft voltage V β is obtained by Park inverse transformation, generates electricity using space vector pulse width modulation (SVPWM)
Control motor is removed in the control of machine driving signal.
As shown in figure 3, corresponding and above-mentioned electric machine control system, the embodiment of the invention also provides a kind of motor controls
Method comprising:
Step S1: main control module sends the motor command electric current of setting to motor drive module by pwm signal；
Step S2: motor drive module goes out described instruction electric current according to the duty ratio identification of the pwm signal, and driving motor is transported
It goes to described instruction electric current.
In step S2, motor drive module goes out described instruction electric current according to the duty ratio identification of the pwm signal, comprising:
The low and high level of pwm signal described in motor drive module real-time detection, and corresponding level is counted, according to one
The sum for counting high level in the period divided by high level and low level sum obtains the duty ratio of pwm signal, then further according to
Instruction current and the relation function of the pwm signal duty ratio obtain described instruction electric current.
In step S2, motor drive module driving motor is run to described instruction electric current, comprising:
The current flow of real-time detection motor adjusts electricity according to the comparison of the current flow of motor and described instruction electric current
The revolving speed of machine,
When the current flow of motor is lower than described instruction electric current, the instruction revolving speed of motor is turned up；When the current flow of motor is high
When described instruction electric current, the instruction revolving speed of motor is turned down；When the current flow of motor is equal to described instruction electric current, electricity is maintained
The instruction revolving speed of machine is constant.
The process of revolving speed for adjusting motor includes:
The three-phase current of motor and the current rotating speed of motor are obtained in real time；
It is generated according to the three-phase current of the current rotating speed of motor, the instruction revolving speed of motor and motor for controlling motor speed
Motor drive signal.
Further, in the embodiment of the present invention, a kind of electric appliance is also additionally provided comprising above-mentioned electric machine control system.
The electric appliance can be refrigerator, washing machine, air-conditioning or blower.When the electric appliance is blower, the electric machine control system can
To accurately control the revolving speed of blower motor, to realize the permanent Boiler pressure control of blower.
In conclusion electric machine control system and method for the invention, are adopted using between main control module and motor drive module
The motor command electric current that setting is transmitted with pwm pulse signal, since motor is when stable, revolving speed and electric current are mutual
Corresponding relationship, without transmitting the motor speed of setting using dedicated communicating circuit, to reduce answering for circuit
Miscellaneous degree；In addition, by the comparison between the running current of real-time detection motor and the instruction current of setting come to motor
Instruction revolving speed be adjusted, the adjustment speed of motor speed can be accelerated, and improve the degree of regulation of motor speed；Work as institute
When stating electric machine control system applied to blower, since the revolving speed of motor can be accurately controlled, to be conducive to the permanent wind of blower
Amount control.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (11)
1. a kind of electric machine control system, which is characterized in that including main control module and motor drive module,
The main control module, for sending the motor command electric current of setting to the motor drive module, institute by pwm signal
The motor command electric current for stating setting is corresponding with the motor speed of setting；
The motor drive module, for going out described instruction electric current, and driving motor according to the duty ratio identification of the pwm signal
It runs to described instruction electric current.
2. electric machine control system as described in claim 1, which is characterized in that the motor drive module includes that instruction current is known
Other unit, low and high level of the described instruction electric current recognition unit for pwm signal described in real-time detection, and to corresponding level into
Row counts, and the sum for counting high level in the period according to one obtains the pwm signal divided by high level and low level sum
Duty ratio, then obtain described instruction electric current further according to the relation function of instruction current and the pwm signal duty ratio.
3. electric machine control system as described in claim 1, which is characterized in that the motor drive module includes rotational speed regulation list
Member, the rotational speed regulation unit are used to adjust motor according to the comparison of the current flow of motor and described instruction electric current
The instruction revolving speed of motor is turned up when the current flow of motor is lower than described instruction electric current in revolving speed；When the current flow of motor is high
When described instruction electric current, the instruction revolving speed of motor is turned down；When the current flow of motor is equal to described instruction electric current, electricity is maintained
The instruction revolving speed of machine is constant.
4. electric machine control system as claimed in claim 3, which is characterized in that the motor drive module, further includes:
Turn count unit, the current rotating speed for real-time estimation motor；
Motor drive signal generation unit, for current rotating speed, the three-phase electricity of the instruction revolving speed and motor of motor according to motor
Stream generates the motor drive signal for controlling motor speed.
5. electric machine control system as described in claim 1, which is characterized in that described instruction electric current is for motor three-phase current
In a phase current setting target current value.
6. a kind of motor control method characterized by comprising
Main control module sends the motor command electric current of setting to motor drive module by pwm signal；
Motor drive module goes out described instruction electric current according to the duty ratio identification of the pwm signal, and driving motor is run to institute
State instruction current.
7. motor control method as claimed in claim 6, which is characterized in that motor drive module is according to the pwm signal
Duty ratio identification goes out described instruction electric current, comprising:
The low and high level of pwm signal described in motor drive module real-time detection, and corresponding level is counted, according to one
The sum for counting high level in the period divided by high level and low level sum obtains the duty ratio of pwm signal, then further according to
Instruction current and the relation function of the pwm signal duty ratio obtain described instruction electric current.
8. motor control method as claimed in claim 6, which is characterized in that motor drive module driving motor is run to described
Instruction current, comprising:
The current flow of real-time detection motor adjusts electricity according to the comparison of the current flow of motor and described instruction electric current
The revolving speed of machine,
When the current flow of motor is lower than described instruction electric current, the instruction revolving speed of motor is turned up；When the current flow of motor is high
When described instruction electric current, the instruction revolving speed of motor is turned down；When the current flow of motor is equal to described instruction electric current, electricity is maintained
The instruction revolving speed of machine is constant.
9. motor control method as claimed in claim 8, which is characterized in that adjust the revolving speed of motor, comprising:
The three-phase current of motor and the current rotating speed of motor are obtained in real time；
It is generated according to the three-phase current of the current rotating speed of motor, the instruction revolving speed of motor and motor for controlling motor speed
Motor drive signal.
10. the motor control method as described in any one of claim 6-9, which is characterized in that described instruction electric current be for
The target current value of phase current setting in motor three-phase current.
11. a kind of electric appliance, which is characterized in that including electric machine control system as described in any one in claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910411031.9A CN110112981A (en) | 2019-05-16 | 2019-05-16 | Electric machine control system, method and electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910411031.9A CN110112981A (en) | 2019-05-16 | 2019-05-16 | Electric machine control system, method and electric appliance |
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| Publication Number | Publication Date |
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| CN110112981A true CN110112981A (en) | 2019-08-09 |
Family
ID=67490688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910411031.9A Pending CN110112981A (en) | 2019-05-16 | 2019-05-16 | Electric machine control system, method and electric appliance |
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Citations (7)
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| US6259226B1 (en) * | 1998-09-03 | 2001-07-10 | Mitsubishi Denki Kabushiki Kaisha | Controller for AC motor |
| CN101183844A (en) * | 2006-11-14 | 2008-05-21 | 株式会社电装 | Motor drive apparatus and method |
| US20090267547A1 (en) * | 2007-03-28 | 2009-10-29 | Kabushiki Kaisha Yaskawa Denki | Motor control device and magnetic pole position estimation precision confirming method |
| CN103312245A (en) * | 2013-06-24 | 2013-09-18 | 珠海格力电器股份有限公司 | Motor controller and motor control method |
| CN105305932A (en) * | 2015-10-28 | 2016-02-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor speed regulation control method and apparatus, and smoke ventilator |
| CN107990484A (en) * | 2017-11-28 | 2018-05-04 | 青岛海信日立空调系统有限公司 | A kind of air conditioner used in kitchen control method |
| CN109660168A (en) * | 2018-12-29 | 2019-04-19 | 珠海格力电器股份有限公司 | A kind of motor control method, system and motor |
-
2019
- 2019-05-16 CN CN201910411031.9A patent/CN110112981A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6259226B1 (en) * | 1998-09-03 | 2001-07-10 | Mitsubishi Denki Kabushiki Kaisha | Controller for AC motor |
| CN101183844A (en) * | 2006-11-14 | 2008-05-21 | 株式会社电装 | Motor drive apparatus and method |
| US20090267547A1 (en) * | 2007-03-28 | 2009-10-29 | Kabushiki Kaisha Yaskawa Denki | Motor control device and magnetic pole position estimation precision confirming method |
| CN103312245A (en) * | 2013-06-24 | 2013-09-18 | 珠海格力电器股份有限公司 | Motor controller and motor control method |
| CN105305932A (en) * | 2015-10-28 | 2016-02-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor speed regulation control method and apparatus, and smoke ventilator |
| CN107990484A (en) * | 2017-11-28 | 2018-05-04 | 青岛海信日立空调系统有限公司 | A kind of air conditioner used in kitchen control method |
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