What is the speed regulation of three-phase asynchronous motor (below)

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What is the speed regulation of three-phase asynchronous motor (below)

Released Date: Jun 18,2021 Article Source: Shengzhou Senli Motor

Cascade speed regulation is actually to change the slip rate of three-phase asynchronous motor by changing the rotor resistance, so as to change the speed and achieve the purpose of speed regulation. When the slip rate s of the motor increases, along with the speed decrease, the working point moves down, and the mechanical characteristics become soft.

Last time we talked aboutThree-phase asynchronous motorThere are three kinds of speed regulation methods: frequency conversion speed regulation, pole change speed regulation and cascade speed regulation; The first two kindsMori machineXiaobian has explained for you, today we look at what is called cascade speed regulation.

Cascade speed regulation is actually changed by changing the rotor resistanceThree-phase AC asynchronous motorSlip rate, thereby changing the speed, to achieve the purpose of speed regulation. When the motor slip ratesIncrease, As the speed drops, Work point down, Mechanical properties become soft. At this time, when the rotor resistance is smoothly adjusted, You can achieve stepless speed regulation, But the speed range is small, And it consumes electricity, Generally used on lifting equipment.

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