Method and device for adjusting permanent magnet motor, equipment, and storage medium

A device for adjusting a permanent magnet motor, comprising a memory, a processor, and a communication interface,

• wherein the memory is configured to store an executable instruction for the processor;
• the communication interface is configured to acquire or transmit information according to an instruction of the processor;
• and
• the processor is configured to:
• acquire a counter electromotive force (CEMF) parameter, information of an electromagnetic structure of the permanent magnet motor to be adjusted and a resistance value of any short-circuited coil of the permanent magnet motor, the CEMF parameter being a CEMF value of the permanent magnet motor at an upper limited rotational speed;
• determine, according to the CEMF parameter, the information of the electromagnetic structure and the resistance value, an operational time of the short-circuited coil;
• judge whether the operational time of the short-circuited coil is consistent with a preset time;
• and
• transmit, to a production equipment, an adjustment instruction configured to instruct the production equipment to adjust the electromagnetic structure of the permanent magnet motor, when the operational time of the short-circuited coil is inconsistent with the preset time, so that the production equipment adjusts the electromagnetic structure of the permanent magnet motor,
• wherein in order to determine, according to the CEMF parameter, the information of the electromagnetic structure and the resistance value, the operational time of the short-circuited coil, the processor is configured to:
• determine a generated heat value of the short-circuited coil by:
• Q=I2Rt,
• wherein Q is the generated heat value in Joules, V is the CEMF value in volts, R is the resistance value in Ohms, and t is a unit time;
• acquire a heat dissipation value generated by a cooling electromagnetic structure of the permanent magnet motor in the unit time according to information of the cooling electromagnetic structure;
• calculate a practical generated heat value of the permanent magnet motor according to the generated heat value and the heat dissipation value, wherein a temperature of the permanent magnet motor rises continuously with an accumulation of the practical generated heat value;
• acquire a threshold temperature value that causes an insulating material to melt and the short-circuited coil to be fused;
• and
• determine, according to the temperature of the permanent magnet motor and the threshold temperature value, the operational time of the short-circuited coil, wherein the operational time of the short-circuited coil is an operational time of the permanent magnet motor before reaching the threshold temperature value.

A non-transitory computer-readable storage medium having stored therein a computer-executable instruction which, when executed by a processor, cause the processor to perform steps of:

• acquiring a counter electromotive force (CEMF) parameter, information of an electromagnetic structure of a permanent magnet motor to be adjusted and a resistance value of any short-circuited coil of the permanent magnet motor, the CEMF parameter being a CEMF value of the permanent magnet motor at an upper limited rotational speed;
• determining, according to the CEMF parameter, the information of the electromagnetic structure and the resistance value, an operational time of the short-circuited coil;
• and
• transmitting, to a production equipment, an adjustment instruction configured to instruct the production equipment to adjust the electromagnetic structure of the permanent magnet motor, when the operational time of the short-circuited coil is inconsistent with a preset time, so that the production equipment adjusts the electromagnetic structure of the permanent magnet motor,
• wherein the determining, according to the CEMF parameter, the information of the electromagnetic structure and the resistance value, the operational time of the short-circuited coil comprises:
• determining a generated heat value of the short-circuited coil by:
• Q=I2Rt,
• wherein Q is the generated heat value in Joules, V is the CEMF value in volts, R is the resistance value in Ohms, and t is a unit time;
• acquiring a heat dissipation value generated by a cooling electromagnetic structure of the permanent magnet motor in the unit time according to information of the cooling electromagnetic structure;
• calculating a practical generated heat value of the permanent magnet motor according to the generated heat value and the heat dissipation value, wherein a temperature of the permanent magnet motor rises continuously with an accumulation of the practical generated heat value;
• acquiring a threshold temperature value that causes an insulating material to melt and the short-circuited coil to be fused;
• and
• determining, according to the temperature of the permanent magnet motor and the threshold temperature value, the operational time of the short-circuited coil, wherein the operational time of the short-circuited coil is an operational time of the permanent magnet motor before reaching the threshold temperature value.