Power supply circuit of an electric and corresponding control method

Abstract

This article describes a circuit for controlling the supply voltage of a motor. This circuit includes: a device for detecting the difference between the grid voltage (V1) and the reference voltage (Vp) and a device (11-14, 17) for generating an alternating correction voltage (V2), the frequency of the correction voltage (V2) The frequency is the same as the grid voltage (V1) and is phase-shifted relative to said grid voltage (V1). The phase shift between the grid voltage and the correction voltage is proportional to the difference between the grid voltage and the reference voltage, and the correction voltage (V2) is added to the grid voltage (V1).

Description

technical field

[0001] The invention relates to a power supply circuit of the stabilized or at least regulated type for motors, with the aim of maximizing the efficiency of the motor or regulating the speed of the motor, in particular for asynchronous motors, and in particular - but not exclusively - for single-phase asynchronous motors.

[0002] The invention also relates to a motor comprising a voltage-regulated type power supply circuit and a method of controlling the power supply voltage of the motor. Background technique

[0003] In motor design, it is assumed that the power supply is constant voltage, and the goal of motor design is to optimize the performance of the motor when designing the voltage. The design voltage range is generally within 200-230V or according to the grid voltage adopted by the country where the motor is used. have other values.

[0004] In fact, the mains voltage is not constant due to possible voltage fluctuations in the grid and due to the s...

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