Power-consumption-free starter for commercial refrigeration compressor

Abstract

The invention belongs to the technical field of motor starting devices and provides a power-consumption-free starter for a commercial refrigeration compressor. The power-consumption-free starter comprises a current transformer L1, a bidirectional controllable silicon T, an inductor L2, a PTC element and a starting capacitor C1. One end of a primary coil and one end of a secondary coil of the current transformer L1 and the T1 pole of the bidirectional controllable silicon T are jointly connected with one end of an alternating current power source. The other end of the primary coil of the current transformer L1 is connected with the leading-out end M of a main winding of the motor, the other end of the secondary coil of the current transformer L1 is connected with the G pole of the bidirectional controllable silicon T, the inductor L2, the PTC element and the starting capacitor C1 are sequentially in series connection between the T2 pole of the bidirectional controllable silicon T and the leading-out end S of an auxiliary winding of the motor, and the combined leading-out end L of the main winding and the auxiliary winding of the motor is connected with the other end of the alternating current power source. The power-consumption-free starter can effectively reduce consumption of reactive power and meet the requirements for energy saving and environment friendliness; a coil of the auxiliary winding can bear large current, and the electrical property is stable; the power-consumption-free starter is good in generality and high in safety.

Description

technical field [0001] The invention belongs to the technical field of motor starting devices, in particular to a non-power consumption starter for commercial refrigeration compressor motors, which is mainly used for starting commercial refrigeration compressor motors, and can also be used for ordinary single-phase AC induction or single-phase AC Starting of permanent magnet motors (hereinafter collectively referred to as single-phase AC motors). Background technique [0002] Most of the current refrigeration compressor motors use single-phase AC motors. Single-phase AC motors are usually composed of a rotor and a stator. The stator has two sets of main and auxiliary windings. The starting and steady-state operation; the auxiliary winding is also called the starting winding, which only works in the starting phase and is used to assist the starting of the motor. The starting methods of single-phase AC motors include resistance starting and capacitor starting. Although the st...

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Problems solved by technology

The starter is mainly used for starting commercial refrigeration compressor motors, and can also be used for starting ordinary single-phase AC motors. current, which affects the stability of the electrical performance of the starter

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