CN-112865656-B - Refrigerator compressor driving method, variable frequency compressor and refrigerator

CN112865656BCN 112865656 BCN112865656 BCN 112865656BCN-112865656-B

Abstract

The invention discloses a refrigerator compressor driving method, a variable frequency compressor and a refrigerator, wherein the method comprises the steps of obtaining a compressor starting instruction and the sequence of the last power-on phase of the compressor, and then electrifying the stator of the compressor according to the sequence of the last electrifying phase of the compressor, and controlling the rotor of the compressor to start from the initial position. When the stator of the compressor is electrified, the starting of the compressor is controlled in a mode of changing the last electrified phase sequence of the compressor, so that the carbonization of the coil of the compressor can be reduced, the positioning current capacity is increased, the starting performance of the compressor is improved, and the service life of the compressor is prolonged.

Inventors

LI XIUJUN
HOU TONGYAO
ZHAO QIANG
ZHANG SHANFANG
PENG HANGUANG

Assignees

海信（山东）冰箱有限公司

Dates

Publication Date: 20260505
Application Date: 20191126

Claims (7)

1. A refrigerator compressor driving method, comprising: Acquiring a compressor starting instruction and the sequence of the last power-on phase of the compressor; Energizing a stator of the compressor according to the sequence of the last energizing phase of the compressor, and controlling a rotor of the compressor to start from an initial position; The energizing phase includes a first phase, a second phase, and a third phase; Energizing the stator of the compressor according to the sequence of the last energizing phase of the compressor, comprising: When the sequence of the last power-on phase of the compressor is the first power-on sequence, a three-phase bridge of the compressor is controlled to power on a stator of the compressor according to the second power-on sequence; when the sequence of the last energizing phase of the compressor is the second energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to a third energizing sequence; when the sequence of the last energizing phase of the compressor is a third energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to the first energizing sequence; The first power-on sequence is a first phase, a second phase and a third phase, the second power-on sequence is a second phase, a third phase and the first phase, and the third power-on sequence is a third phase, the first phase and the second phase.
2. The method of claim 1, wherein the initial position of the rotor is determined according to the steps of: acquiring the last starting load of the compressor; and determining the initial position of the rotor according to the last starting load of the compressor and the corresponding relation between the load and the initial position of the rotor.
3. A variable frequency compressor, comprising: a stator for providing an alternating magnetic field; the rotor is used for driving the connecting rod to move under the action of the alternating magnetic field; a power supply for powering the compressor; The variable frequency controller is used for controlling the operation of the compressor; the variable frequency controller is specifically used for acquiring a compressor starting instruction and the sequence of the last power-on phase of the compressor, powering on a stator of the compressor according to the sequence of the last power-on phase of the compressor, and controlling a rotor of the compressor to start from an initial position; The energizing phase includes a first phase, a second phase, and a third phase; The variable frequency controller is specifically configured to: When the sequence of the last power-on phase of the compressor is the first power-on sequence, a three-phase bridge of the compressor is controlled to power on a stator of the compressor according to the second power-on sequence; when the sequence of the last energizing phase of the compressor is the second energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to a third energizing sequence; when the sequence of the last energizing phase of the compressor is a third energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to the first energizing sequence; The first power-on sequence is a first phase, a second phase and a third phase, the second power-on sequence is a second phase, a third phase and the first phase, and the third power-on sequence is a third phase, the first phase and the second phase.
4. A variable frequency compressor according to claim 3, wherein the variable frequency controller is specifically configured to: determining an initial position of the rotor according to the steps of: acquiring the last starting load of the compressor; and determining the initial position of the rotor according to the last starting load of the compressor and the corresponding relation between the load and the initial position of the rotor.
5. A refrigerator comprising the inverter compressor according to any one of claims 3 to 4.
6. A computing device, comprising: A memory for storing program instructions; A processor for invoking program instructions stored in said memory to perform the method of any of claims 1-2 in accordance with the obtained program.
7. A computer readable non-transitory storage medium comprising computer readable instructions which, when read and executed by a computer, cause the computer to perform the method of any of claims 1 to 2.

Description

Refrigerator compressor driving method, variable frequency compressor and refrigerator Technical Field The embodiment of the invention relates to the technical field of refrigerators, in particular to a refrigerator compressor driving method, a variable frequency compressor and a refrigerator. Background Most of the current refrigerator variable frequency controllers adopt a magnetic field orientation control (Field Oriented Control, FOC) algorithm. One core idea of the FOC algorithm is to algorithmically split the magnetic field applied to the motor into the D-axis (excitation) and Q-axis (torque), change the excitation by adjusting the D-axis, and change the torque by adjusting the Q-axis, so that the three-phase permanent magnet synchronous motor (PERMANENT MAGNET Synchronous Motor, PMSM) can be adjusted for excitation and torque as a general dc motor is driven. However, when the PMSM is electrified at present, the fixed phase is electrified, so that the coil of the compressor is carbonized, and the service life of the compressor is reduced. Disclosure of Invention The embodiment of the invention provides a refrigerator compressor driving method, a variable frequency compressor and a refrigerator, which are used for reducing carbonization of a compressor coil, improving starting performance of the compressor and prolonging service life of the compressor. In a first aspect, an embodiment of the present invention provides a method for driving a compressor of a refrigerator, including: Acquiring a compressor starting instruction and the sequence of the last power-on phase of the compressor; and electrifying the stator of the compressor according to the sequence of the last electrifying phase of the compressor, and controlling the rotor of the compressor to start from an initial position. Optionally, the energizing phase includes a first phase, a second phase, and a third phase; Energizing the stator of the compressor according to the sequence of the last energizing phase of the compressor, comprising: When the sequence of the last power-on phase of the compressor is the first power-on sequence, a three-phase bridge of the compressor is controlled to power on a stator of the compressor according to the second power-on sequence; when the sequence of the last energizing phase of the compressor is the second energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to a third energizing sequence; when the sequence of the last energizing phase of the compressor is a third energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to the first energizing sequence; The first power-on sequence is a first phase, a second phase and a third phase, the second power-on sequence is a second phase, a third phase and the first phase, and the third power-on sequence is a third phase, the first phase and the second phase. Optionally, the initial position of the rotor is determined according to the following steps: acquiring the last starting load of the compressor; and determining the initial position of the rotor according to the last starting load of the compressor and the corresponding relation between the load and the initial position of the rotor. In a second aspect, an embodiment of the present invention provides a variable frequency compressor, including: a stator for providing an alternating magnetic field; the rotor is used for driving the connecting rod to move under the action of the alternating magnetic field; a power supply for powering the compressor; The variable frequency controller is used for controlling the operation of the compressor; the variable frequency controller is specifically used for acquiring a compressor starting instruction and the sequence of the last power-on phase of the compressor, powering on a stator of the compressor according to the sequence of the last power-on phase of the compressor, and controlling the rotor of the compressor to start from an initial position. Optionally, the energizing phase includes a first phase, a second phase, and a third phase; The variable frequency controller is specifically configured to: When the sequence of the last power-on phase of the compressor is the first power-on sequence, a three-phase bridge of the compressor is controlled to power on a stator of the compressor according to the second power-on sequence; when the sequence of the last energizing phase of the compressor is the second energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to a third energizing sequence; when the sequence of the last energizing phase of the compressor is a third energizing sequence, a three-phase bridge of the compressor is controlled to energize a stator of the compressor according to the first energizing sequence; The first power-on sequence is a first phase, a second pha