Permanent-magnetic synchronous linear motor driver

Abstract

The invention relates to a permanent-magnetic synchronous linear motor driver, which is characterized by comprising a first filer (1) for filtering single-phase utility power, a rectifier (2) for converting alternating current into direct current, a second filter (3) for smoothly processing the direct current, an inverter (4) for converting the direct current into three-phase alternating current to drive a linear motor, a current detection device (5) for detecting the current of the linear motor and a controller (8) for executing precise control of the linear motor and receiving a feedback signal of the linear motor, wherein the controller (8) is used for receiving an analog signal and a power supply voltage signal from the current detection device (5), meanwhile receiving the feedback signal from an active cell position of a grating ruler of the linear motor, performing internal processing on the three data and outputting a control signal to precisely control the motion position and the thrust of the active cell of the linear motor. Compared with the prior art, the driver has the advantage of precisely controlling the thrust, speed and position of the linear motor.

Description

technical field [0001] The invention relates to a permanent magnet synchronous linear motor driver. Background technique [0002] Linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. In many industrial fields, the motion path of the controlled object is often in the form of a straight line. But unfortunately, in the past, due to the insufficient development of linear motion drives, the final linear motion, or one-way displacement or two-way reciprocating displacement, has to be obtained by means of the rotary motion of the rotating motor and the mechanical conversion link for a long time. Obviously, this way of obtaining linear motion has an "indirect" nature. If the driver can provide thrust in the form of linear motion to the controlled object to obtain a limited controllable displacement in one or two directions, then the two are directly matched in the form of ...

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Problems solved by technology

However, due to its direct drive characteristics, the thrust fluctuation caused by the end effect, cogging effect, and ripple effect, the friction force introduced by the primary and secondary attraction and the preload of the guide rail, and the load force during operation will all control it. The accuracy has a great influence, so it is necessary to carefully design the servo driver suitable for this type of linear motor

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