CN-115333403-B - Motor starting control method and device and electronic equipment

CN115333403BCN 115333403 BCN115333403 BCN 115333403BCN-115333403-B

Abstract

The embodiment of the invention discloses a control method and device for starting a motor and electronic equipment. The method comprises the steps of determining the temperature of safe starting of a motor, detecting the speed and the steering of the motor, enabling the starting acceleration and the starting time of the motor according to the speed and the steering of the motor, and monitoring the bus voltage of the motor, wherein the starting acceleration of the motor is inversely proportional to the upwind rotating speed of the motor, the starting time of the motor is directly proportional to the upwind rotating speed of the motor, the upwind rotating speed of the motor is determined according to the speed and the steering of the motor, and the motor is controlled to be in a state to be started according to the bus voltage of the motor. The invention solves the technical problem that the motor is easy to be started under severe working conditions such as low temperature, upwind and the like in the related technology, so that the motor can not be started effectively, and achieves the technical effects of improving the adaptability of the motor under the severe working conditions, improving the starting efficiency of the motor and effectively guaranteeing the safety and reliability of the operation of the motor.

Inventors

WEI JUNYAN
JIANG ZE
DU RONGFA
YU YIFENG
FANG SHUANGQUAN

Assignees

卧龙电气驱动集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20220811

Claims (8)

1. The motor starting control method is characterized by being applied to a driving and controlling integrated machine adopting a thin film capacitor or a small electrolytic capacitor, and comprising the following steps of: determining the temperature of the motor at which the motor is safely started; Detecting the speed and the steering of the motor; Enabling starting acceleration and starting time of the motor according to the speed and the steering direction of the motor, and monitoring bus voltage of the motor, wherein the starting acceleration of the motor is inversely proportional to the upwind steering speed of the motor, the starting time of the motor is directly proportional to the upwind steering speed of the motor, and the upwind rotating speed of the motor is determined according to the speed and the steering direction of the motor; controlling the motor to be in a state to be started according to the bus voltage of the motor, wherein the state to be started comprises at least one of a low-speed state and a static state, wherein, The method comprises the steps of judging whether the bus voltage of the motor is larger than a preset threshold value, adjusting the operation parameters of the motor until the motor is in a state to be started under the condition that the bus voltage is larger than the preset threshold value, and controlling the motor to be in the state to be started under the condition that the bus voltage is smaller than or equal to the preset threshold value; wherein the operating parameters of the motor include a torque output value of the motor, and adjusting the operating parameters of the motor includes: and calling a voltage suppression function, wherein the expression of the voltage suppression function is as follows: Wherein, the Representing the torque output value of the motor, Representing the difference between the upper limit value of the bus voltage of the motor and the real time value of the bus voltage of the motor, The scale factor is represented by a ratio of, The integral coefficient is represented by a value of, And controlling the torque output value of the motor according to the voltage suppression function.
2. The method of claim 1, wherein prior to determining that the motor is at a safe start-up temperature, the method further comprises: acquiring the winding temperature of the motor and the capacitance temperature of the motor; Judging whether the winding temperature of the motor is smaller than a first temperature threshold value and whether the capacitance temperature of the motor is smaller than a second temperature threshold value; controlling the motor to reach a safe starting temperature under the condition that the winding temperature of the motor is smaller than the first temperature threshold value and/or the capacitance temperature of the motor is smaller than the second temperature threshold value; And determining that the motor reaches the temperature for safe starting when the winding temperature of the motor is greater than or equal to the first temperature threshold and the capacitance temperature of the motor is greater than or equal to the second temperature threshold.
3. The method of claim 2, wherein obtaining the winding temperature of the motor and the capacitance temperature of the motor comprises: acquiring a sensor temperature acquired at a controller of the motor; And respectively inquiring a corresponding relation array of the sensor temperature and the winding temperature and a corresponding relation array of the sensor temperature and the capacitance temperature according to the sensor temperature acquired at the controller of the motor to obtain the winding temperature of the motor and the capacitance temperature of the motor.
4. The method of claim 2, wherein controlling the motor to a safe start-up temperature comprises: acquiring a rotor position of the motor; And heating the motor according to the rotor position of the motor until the motor reaches the safe starting temperature.
5. The method of claim 1, wherein detecting the speed and steering of the motor comprises: And detecting the motor based on a direct stator flux linkage observer and a high-frequency injection algorithm to obtain the speed and the steering of the motor.
6. The method according to any one of claims 1 to 5, wherein the expression of the inverse ratio of the starting acceleration of the motor and the upwind rotation of the motor is: The expression of the direct proportion of the starting time of the motor and the upwind rotation speed of the motor is as follows: Wherein, the method comprises the steps of, Representing the upwind rotational speed of the motor, Indicating the start-up acceleration of the motor, Indicating the start-up time of the motor, A scaling factor representing an inverse ratio of a start acceleration of the motor to a wind speed of the motor, And a proportionality coefficient which represents the starting time of the motor and the direct proportionality of the upwind rotation speed of the motor.
7. The utility model provides a control device that motor started, its characterized in that sets up in the drive accuse all-in-one that adopts film electric capacity or little electrolytic capacitor, includes: the determining module is used for determining the temperature of the motor at safe starting; The detection module is used for detecting the speed and the steering direction of the motor; the monitoring module is used for enabling the starting acceleration and the starting time of the motor according to the speed and the steering of the motor and monitoring the bus voltage of the motor, wherein the starting acceleration of the motor is inversely proportional to the upwind speed of the motor, the starting time of the motor is directly proportional to the upwind speed of the motor, and the upwind speed of the motor is determined according to the speed and the steering of the motor; The control module is used for controlling the motor to be in a state to be started according to the bus voltage of the motor, wherein the state to be started comprises at least one of a low-speed state and a static state, The control module comprises a judging unit, an adjusting unit, a control unit and a control unit, wherein the judging unit is used for judging whether the bus voltage of the motor is larger than a preset threshold value, the adjusting unit is used for adjusting the operation parameters of the motor until the motor is in a state to be started under the condition that the bus voltage is larger than the preset threshold value, and the control unit is used for controlling the motor to be in the state to be started under the condition that the bus voltage is smaller than or equal to the preset threshold value; The motor operation parameter comprises a motor torque output value, and the adjustment unit comprises a calling subunit, a voltage suppression function and a control unit, wherein the calling subunit is used for calling the voltage suppression function, and the expression of the voltage suppression function is as follows: Wherein, the Representing the torque output value of the motor, Representing the difference between the upper limit value of the bus voltage of the motor and the real time value of the bus voltage of the motor, The scale factor is represented by a ratio of, The integral coefficient is represented by a value of, And the control subunit is used for controlling the torque output value of the motor according to the voltage suppression function.
8. An electronic device, comprising: A processor; A memory for storing processor-executable instructions; wherein the processor is configured to perform the method steps of any of claims 1 to 6.

Description

Motor starting control method and device and electronic equipment Technical Field The present invention relates to the field of motor control technologies, and in particular, to a method and an apparatus for controlling motor start, and an electronic device. Background At present, the variable frequency drive is transformed towards the high-efficiency and mechanical control integrated direction. The frequency conversion driving part adopts the traditional electrolysis scheme to increase the system volume and the cost, and compared with the thin film capacitor, the frequency conversion driving part has short service life, so that the driving and controlling system adopting the thin film scheme or the small electrolysis capacitor scheme is more and more favored by the market, and is also a future trend. However, the use of thin film solutions or small electrolytic capacitor solutions also presents control difficulties, especially in terms of starting. As the application of motor systems is increasingly developed towards the integration of group control, when the group control motor operates in a wind wall environment, turbulence between fans can cause more complex fan starting conditions. When there are both normal running motors and unopened motors in the wind wall, if a unique group control starting strategy is not adopted for the unopened motors, the system will fail to start, the starting period will be too long, and even the risk of damaging the system will be caused. At this time, when the motor is started, the motor state is uncertain, and static, upwind operation, downwind operation and the like are possible, and high-speed or low-speed conditions exist in the upwind direction. Because the system adopts a thin film scheme or a small electrolytic capacitor scheme, the capacitance value of the bus capacitor is smaller, under the condition of no sensing operation, the phenomenon of bus voltage lifting possibly exists when the direct braking is started under the condition of high upwind speed or heavy upwind load, and the bus capacitor and an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) are easy to break down under high voltage, so that the control system is damaged. Therefore, the system is effectively and quickly started in upwind operation, reduces braking time, improves system starting efficiency and is a new difficulty. In addition, the scheme of the existing driving and controlling integrated machine has wider application field, typhoon and salt fog corrosion resistance is required in coastal areas, and low-temperature starting resistance is required in northern areas. If the motor scheme adopts a ferrite scheme, special starting measures are also required during starting so as to ensure that the motor is not easy to lose magnetism. Under the low-temperature environment, the small electrolytic capacitor also has the condition that the internal electrolyte is solidified, so that the capacitance value of the effective capacitor is reduced and the normal operation is not realized. For the above-described problems, no effective solution has been proposed. Disclosure of Invention The embodiment of the invention provides a control method and device for starting a motor and electronic equipment, which at least solve the technical problem that the motor cannot be started effectively due to the fact that the motor is started easily under severe working conditions such as low temperature and upwind in the related art. According to one aspect of the embodiment of the invention, a control method for starting a motor is provided, which comprises the steps of determining the temperature of the motor at safe starting, detecting the speed and the steering of the motor, enabling the starting acceleration and the starting time of the motor according to the speed and the steering of the motor, and monitoring the bus voltage of the motor, wherein the starting acceleration and the reverse wind speed of the motor are inversely proportional to each other, the starting time and the reverse wind speed of the motor are directly proportional to each other, the reverse wind speed of the motor is determined according to the speed and the steering of the motor, and the motor is controlled to be in a state to be started according to the bus voltage of the motor, and the state to be started comprises at least one of a low-speed state and a static state. Optionally, before determining that the motor is at the safe starting temperature, the method further comprises the steps of obtaining the winding temperature of the motor and the capacitance temperature of the motor, judging whether the winding temperature of the motor is smaller than a first temperature threshold value and whether the capacitance temperature of the motor is smaller than a second temperature threshold value, controlling the motor to achieve the safe starting temperature under the condition that the winding temperature of the motor is