CN113992078B - Permanent magnet synchronous motor starting current control system and control method - Google Patents
Permanent magnet synchronous motor starting current control system and control method Download PDFInfo
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- CN113992078B CN113992078B CN202111386937.3A CN202111386937A CN113992078B CN 113992078 B CN113992078 B CN 113992078B CN 202111386937 A CN202111386937 A CN 202111386937A CN 113992078 B CN113992078 B CN 113992078B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000001052 transient effect Effects 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052744 lithium Inorganic materials 0.000 abstract description 16
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005259 measurement Methods 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
-
- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
Abstract
The invention discloses a method for controlling starting current of a permanent magnet synchronous motor, which comprises the following steps: step one: obtaining a maximum peak phase current value which can be born by a power switch device in a permanent magnet synchronous motor driving system, and calculating a maximum bus current value corresponding to the starting of the permanent magnet synchronous motor according to the maximum peak phase current value; step two: calculating the maximum transient current value which can be output by the battery; step three: when the maximum transient current value is greater than the maximum bus current value, then performing a start according to the maximum bus current value and the maximum peak phase current value; when the maximum transient current value is smaller than the maximum bus current value, a maximum peak phase current value is calculated from the maximum transient current value, and starting is performed from the maximum transient current value and the maximum peak phase current value. According to the invention, the peak battery in the battery power state is obtained, and the bus current during starting is regulated, so that the work of the lithium battery is effectively protected, and the service life of the lithium battery is prolonged.
Description
Technical Field
The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a permanent magnet synchronous motor starting current control system and a control method according to a battery power state.
Background
The lithium battery is an important power battery, is applied to various fields, and is widely applied to two-wheel electric vehicles, electric motorcycles and new energy automobiles.
The motor needs a large current when starting, and the phase current and the bus current need to be limited in order to protect the power switch device when starting. The traditional current limiting method takes the maximum phase current which can be born by the power switch device as a current limiting measurement standard, and the current limiting method can lead the starting speed of the motor to be the highest. It is also an option to set only one fixed bus current limit value and phase current limit value to ensure that the power switching device is not damaged. The former method does not consider the battery discharge capacity, and damages the battery without reducing the current limit when the battery discharge capacity becomes weak. The latter approach is conservative and does not allow for rapid start performance.
The invention fully considers the power state of the battery and the phase current which can be born by the switching device, and establishes a new starting current control method.
Disclosure of Invention
The invention provides a starting current control system and a control method for a permanent magnet synchronous motor, which are used for solving the problem that the starting current can be increased when the power state of a battery is in a peak state in the prior art, and the starting current is not limited by bus current.
The invention provides a method for controlling starting current of a permanent magnet synchronous motor, which comprises the following steps:
step one: obtaining a maximum peak phase current value which can be born by a power switch device in a permanent magnet synchronous motor driving system, and calculating a maximum bus current value corresponding to the starting of the permanent magnet synchronous motor according to the maximum peak phase current value;
step two: calculating the maximum transient current value which can be output by the battery;
step three: when the maximum transient current value is greater than the maximum bus current value, then performing a start according to the maximum bus current value and the maximum peak phase current value; when the maximum transient current value is smaller than the maximum bus current value, a maximum peak phase current value is calculated from the maximum transient current value, and starting is performed from the maximum transient current value and the maximum peak phase current value.
Optionally, the step one calculates a maximum bus current value corresponding to the starting of the permanent magnet synchronous motor according to the maximum peak phase current value, and the specific method comprises the following steps:
wherein I is phasemax For maximum peak phase current value, I busmax The value range of k is 3.5-4.5 for the maximum bus current value.
Optionally, in the second step, a maximum transient current value which can be output by the battery is calculated according to the battery power state and the battery temperature, and the specific method comprises the following steps:
x=1,2,3……
wherein I is max For the maximum output current for the current battery power state,and (3) taking the maximum transient current value as a maximum, wherein T (x) is a preset protection temperature of the xth stage, and T is the current battery temperature.
Optionally, in the second step, the maximum transient current value that can be output by the battery is calculated according to the remaining capacity and the temperature of the battery, and the specific method is as follows:
x＝1,2,3……
wherein R is the current residual capacity of the battery, R max For the current remaining battery capacity, I m And the maximum discharge current corresponding to the residual capacity of the current battery.
Optionally, in the third step, the maximum peak phase current value is calculated according to the maximum transient current value, and the specific calculation method is as follows:
wherein a is a battery power state constant; p is the phase current conversion constant of the permanent magnet synchronous motor.
The invention provides a starting current control system of a permanent magnet synchronous motor, which comprises the following components: the lithium battery unit is connected with the permanent magnet synchronous motor and the lithium battery unit;
the current detection unit is connected with the lithium battery unit, the permanent magnet synchronous motor and the motor driving unit and is used for detecting the discharge current of the lithium battery, the bus current of the permanent magnet synchronous motor and the phase current of the power switch device of the permanent magnet synchronous motor, and then feeding back to the motor driving unit;
the motor driving unit is connected with the permanent magnet synchronous motor and the current detection unit and is used for receiving feedback of the current detection unit so as to adjust bus current of the permanent magnet synchronous motor and phase current of a power switch device of the permanent magnet synchronous motor;
the battery protection unit is connected with the permanent magnet synchronous motor and the lithium battery unit and is used for regulating battery discharge according to the busbar current of the permanent magnet synchronous motor and the phase current of a power switch device of the permanent magnet synchronous motor so as to achieve the purpose of prolonging the service life of the battery;
the lithium battery unit is connected with the battery protection unit and the current detection unit and is used for providing starting current of the permanent magnet synchronous motor.
The invention has the beneficial effects that:
1. according to the invention, the peak battery in the battery power state is obtained, and the bus current during starting is regulated, so that the work of the lithium battery is effectively protected, and the service life of the lithium battery is prolonged.
2. The invention effectively ensures the normal starting operation of the permanent magnet synchronous motor and greatly improves the working efficiency of the permanent magnet synchronous motor by adopting the bus current and the phase current of the power switch device when the power state of the battery is detected to regulate the starting.
3. Aiming at the traditional permanent magnet synchronous motor starting current control system and method, the invention adopts the permanent magnet synchronous motor starting current control system and method according to the battery power state, improves the starting efficiency of the permanent magnet synchronous motor, and has high practicability.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the invention in any way, in which:
FIG. 1 is a flow chart of a method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of bus current and phase current conversion in an embodiment of the present invention;
fig. 3 is a schematic diagram of a system according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The embodiment of the invention provides a method for controlling starting current of a permanent magnet synchronous motor, which is shown in fig. 1 and comprises the following steps:
step one: the maximum peak phase current value born by a power switch device in a permanent magnet synchronous motor driving system is obtained, and the maximum bus current value corresponding to the starting of the permanent magnet synchronous motor is calculated according to the maximum peak phase current value, wherein the specific formula is as follows:
wherein I is phasemax For maximum peak phase current value, I busmax The value range of k is 3.5-4.5 for the maximum bus current value;
step two: calculating the maximum transient current value which can be output by the battery;
the maximum transient current value which can be output by the battery can be calculated according to the battery power state and the battery temperature, and the specific method comprises the following steps:
x=1,2,3……
wherein I is max For the maximum output current for the current battery power state,and (3) taking the maximum transient current value as a maximum, wherein T (x) is a preset protection temperature of the xth stage, and T is the current battery temperature.
The maximum transient current value which can be output by the battery can be calculated according to the residual capacity and the temperature of the battery, and the specific method comprises the following steps:
x＝1,2,3……
wherein R is the current residual capacity of the battery, R max For the current remaining battery capacity, I m Maximum discharge current corresponding to the residual capacity of the current battery;
step three: when the maximum transient current value is greater than the maximum bus current value, then performing a start according to the maximum bus current value and the maximum peak phase current value; when the maximum transient current value is smaller than the maximum bus current value, calculating a maximum peak phase current value according to the maximum transient current value, and executing starting according to the maximum transient current value and the maximum peak phase current value;
the method for calculating the maximum peak value phase current value according to the maximum transient current value comprises the following steps:
wherein a is a battery power state constant, generally taking 1.12; p is the phase current conversion constant of the permanent magnet synchronous motor, and generally 2.83 is taken.
As shown in fig. 2, the defined switching amounts Sa1, sa2, sb1, sb2, sc1, sc2 represent the switching states of 6 power switching devices. When Sa1, sb1 or Sc1 is 1, the switching device of the upper bridge arm of the inverter circuit is turned on, and the switching device of the lower bridge arm is turned off, namely Sa2, sb2 or Sc2 is 0; conversely, when Sa1, sb1, or Sc1 is 0, the switching device of the upper leg is turned off and the switching device of the lower leg is turned on, i.e., sa2, sb2, or Sc2 is 1. Because the upper and lower switching devices of the same bridge arm cannot be conducted simultaneously, the three-way inverter bridge of the inverter has 8 switching configurations in total. The functional relationship between the alternating side phase current and the bus current is:
wherein I is aN 、I bN And I cN For three phase currents on the ac side, I dc Is the bus current.
As shown in fig. 3, the present invention further provides a permanent magnet synchronous motor starting current control system according to a battery power state, which includes a permanent magnet synchronous motor 24, a lithium battery unit 20, a battery protection unit 21, a motor driving unit 22 and a current detection unit 23, and is specifically described as follows:
the current detection unit 23 is connected with the lithium battery unit 20, the permanent magnet synchronous motor 24 and the motor driving unit 22, and is used for detecting the discharge current of the lithium battery, the bus current of the permanent magnet synchronous motor and the phase current of the power switching device of the permanent magnet synchronous motor, and then feeding back to the motor driving unit;
the motor driving unit 22 is connected with the permanent magnet synchronous motor 24 and the current detection unit 23 and is used for receiving feedback of the current detection unit so as to adjust bus current of the permanent magnet synchronous motor and phase current of a power switch device of the permanent magnet synchronous motor;
the battery protection unit 21 is connected with the permanent magnet synchronous motor 24 and the lithium battery unit 20, and is used for adjusting battery discharge according to the busbar current of the permanent magnet synchronous motor and the phase current of a power switch device of the permanent magnet synchronous motor so as to achieve the purpose of prolonging the service life of the battery;
the lithium battery unit 20 is connected with the battery protection unit 21 and the current detection unit 23, and is used for providing starting current of the permanent magnet synchronous motor.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention as defined by the appended claims.
Claims (1)
1. A method for controlling the starting current of a permanent magnet synchronous motor, comprising:
step one: the maximum peak phase current value born by a power switch device in a permanent magnet synchronous motor driving system is obtained, and the maximum bus current value corresponding to the starting of the permanent magnet synchronous motor is calculated according to the maximum peak phase current value, wherein the specific formula is as follows:
wherein I is phasemax For maximum peak phase current value, I busmax The value range of k is 3.5-4.5 for the maximum bus current value;
step two: the maximum transient current value which can be output by the battery is calculated, and the method specifically comprises the following steps:
calculating the maximum transient current value of the battery which can bear the output according to the battery power state and the battery temperature, or calculating the maximum transient current value of the battery which can bear the output according to the battery residual capacity and the battery temperature,
the specific formula for calculating the maximum transient current value which can be output by the battery according to the battery power state and the battery temperature is as follows:
wherein I is max For the maximum output current for the current battery power state,t (x) is a preset x-th-stage protection temperature, and T is the current battery temperature;
the specific formula for calculating the maximum transient current value which can be output by the battery according to the residual capacity and the temperature of the battery is as follows:
wherein I is max Maximum output current for a current battery power state，T (x) is a preset x-th-stage protection temperature, and T is the current battery temperature;
step three: when the maximum transient current value is greater than the maximum bus current value, then performing a start according to the maximum bus current value and the maximum peak phase current value; when the maximum transient current value is smaller than the maximum bus current value, the maximum peak phase current value is recalculated based on the maximum transient current value, starting is performed based on the maximum transient current value and the recalculated maximum peak phase current value,
the method for calculating the maximum peak value phase current value according to the maximum transient current value comprises the following steps of:
wherein a is a battery power state constant; p is the phase current conversion constant of the permanent magnet synchronous motor.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0596789A1 (en) * | 1992-11-04 | 1994-05-11 | Société Anonyme dite: REGIE NATIONALE DES USINES RENAULT | Method and device for measuring the charge of an accumulator battery |
| US6727670B1 (en) * | 2002-12-12 | 2004-04-27 | Ford Global Technologies, Llc | Battery current limiter for a high voltage battery pack in a hybrid electric vehicle powertrain |
| CN102490614A (en) * | 2011-11-15 | 2012-06-13 | 上海三运电机控制技术有限公司 | Comprehensive protection control method for controller drive system of electric automobile |
| CN105406781A (en) * | 2015-12-07 | 2016-03-16 | 合肥巨一动力系统有限公司 | Permanent magnet synchronous motor power transmission circuit with battery protection function and battery protection control method thereof |
| CN107264298A (en) * | 2017-07-07 | 2017-10-20 | 北京新能源汽车股份有限公司 | Range extender of electric vehicle control method and device |
| CN107813708A (en) * | 2017-11-02 | 2018-03-20 | 北京理工大学 | A kind of range extended electric vehicle power system and its control method |
| CN108233775A (en) * | 2018-03-14 | 2018-06-29 | 浙江国自机器人技术有限公司 | A kind of vehicle or the start-up circuit of complete machine and startup method |
| CN110525217A (en) * | 2019-08-12 | 2019-12-03 | 山东元齐新动力科技有限公司 | Start rectifier, distance increasing unit, electric car and its distance increasing unit detection method |
| JP2020159268A (en) * | 2019-03-26 | 2020-10-01 | 哲美 渡邉 | Control system for stirling engine generator |
| CN112564556A (en) * | 2020-11-20 | 2021-03-26 | 江苏科技大学 | Demagnetizing and magnetic braking device and method based on three-phase current of brushless direct current motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5616409B2 (en) * | 2012-09-06 | 2014-10-29 | ファナック株式会社 | Control device for permanent magnet synchronous motor for preventing irreversible demagnetization of permanent magnet and control system provided with such control device |
-
2021
- 2021-11-22 CN CN202111386937.3A patent/CN113992078B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0596789A1 (en) * | 1992-11-04 | 1994-05-11 | Société Anonyme dite: REGIE NATIONALE DES USINES RENAULT | Method and device for measuring the charge of an accumulator battery |
| US6727670B1 (en) * | 2002-12-12 | 2004-04-27 | Ford Global Technologies, Llc | Battery current limiter for a high voltage battery pack in a hybrid electric vehicle powertrain |
| CN102490614A (en) * | 2011-11-15 | 2012-06-13 | 上海三运电机控制技术有限公司 | Comprehensive protection control method for controller drive system of electric automobile |
| CN105406781A (en) * | 2015-12-07 | 2016-03-16 | 合肥巨一动力系统有限公司 | Permanent magnet synchronous motor power transmission circuit with battery protection function and battery protection control method thereof |
| CN107264298A (en) * | 2017-07-07 | 2017-10-20 | 北京新能源汽车股份有限公司 | Range extender of electric vehicle control method and device |
| CN107813708A (en) * | 2017-11-02 | 2018-03-20 | 北京理工大学 | A kind of range extended electric vehicle power system and its control method |
| CN108233775A (en) * | 2018-03-14 | 2018-06-29 | 浙江国自机器人技术有限公司 | A kind of vehicle or the start-up circuit of complete machine and startup method |
| JP2020159268A (en) * | 2019-03-26 | 2020-10-01 | 哲美 渡邉 | Control system for stirling engine generator |
| CN110525217A (en) * | 2019-08-12 | 2019-12-03 | 山东元齐新动力科技有限公司 | Start rectifier, distance increasing unit, electric car and its distance increasing unit detection method |
| CN112564556A (en) * | 2020-11-20 | 2021-03-26 | 江苏科技大学 | Demagnetizing and magnetic braking device and method based on three-phase current of brushless direct current motor |
Non-Patent Citations (2)
| Title |
|---|
| Modeling and Design of a Efficient Magnetostrictive Energy Harvesting System with Low-Voltage and Low-Power under Low Vibration Excitation;S. Cao等;2018 IEEE International Magnetics Conference (INTERMAG);全文 * |
| 基于最小单位里程能耗的纯电动公交车加速控制曲线设计方法;李礼夫;许源沁;;汽车技术(第07期);第17-20页 * |
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