Acentric timing and speed-stabilized motor

Abstract

The invention provides a speed regulating and stabilizing motor capable of controlling the rotate speed of the motor accurately and is mainly used for the stepless speed regulation and stabilization of ordinary DC motors and AC motors. The invention mainly comprises a centrifugal speed regulator which is fixed on a projecting shaft at the tail of the motor. When a motor shaft rotates, a centrifugal switch on the centrifugal speed regulator is driven to rotate at the same time by the gear coupling. When the rotate speed of the motor surpasses the presetting value, the centrifugal switch is off; otherwise, the centrifugal switch is on. The input current of the motor flows through an electric brush and the centrifugal switch is used to control the on and off time, thereby controlling the rotate speed of the motor. The rotate speed is regulated by the drive-by-wire or a servo-actuator to regulate the pressure of the centrifugal switch; if the pressure is great, the rotate speed is regulated to be high; if the pressure is small, the rotate speed is regulated to be slow. The application of a thyristor amplifying circuit to a large-sized motor ensures that the motor with high voltage and great current can be controlled even if the current flowing through the centrifugal switch and the voltage are small.

Description

Technical field [0001] The invention is used for stepless speed regulation and speed stabilization of common AC and DC motors. Background technique [0002] At present, the mechanical speed-stabilizing circuit in which a centrifugal switch is connected in series on the circuit inside the motor to stabilize the motor speed has been applied for a long time. The circuit is based on the principle that the centrifugal force is proportional to the rotational speed. When the rotational speed is higher than the set value, the centrifugal switch disconnects the motor circuit under the action of the centrifugal force to reduce the motor speed to the set value; when the rotational speed is lower than the set value, The centrifugal switch closes the circuit, causing the motor speed to increase. Since the centrifugal switch is a built-in type at present, the motor needs to be turned on to adjust the motor speed, so it can only be used for motor speed stabilization and not for motor spee...

AI Technical Summary

Problems solved by technology

Since the current centrifugal switch is a built-in type, the motor needs to be turned on to adjust the motor speed, so it can only be used for motor speed stabilization and not for motor speed regulation.

Another defect of the centrifugal switch is that due to the limitation of the spark elimination circuit, its control current is small, so it can only be used for small motors.

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