Speed sensor-free speed regulation device and method for DC motor
A speed sensorless, DC motor technology, applied in the direction of excitation or armature current control, can solve the problems of increasing system complexity, increasing system maintenance workload, increasing system cost, etc., to achieve convenient operation and maintenance, and wide practicability , the effect of low cost
Active Publication Date: 2012-07-25
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology
Usually, a special sensor needs to be installed to detect the internal temperature of the motor, which not only increases the system cost but also increases the complexity of the system, and increases the maintenance workload of the system
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Embodiment Construction
[0012] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:
[0013] As shown in the figure, the DC motor speed sensorless speed control device of the present invention includes an armature circuit voltage and current sensor 5, an excitation circuit voltage and current sensor 6, a controller 7 and a full digital keyboard 8; the controller 7 includes a sequence Connected low-pass filter circuit, digital sampling circuit, micro-core processor and Schmitt trigger circuit, wherein the model of the micro-core processor is TMS320F2812 produced by TI company. The input end of the low-pass filter circuit in the controller 7 is respectively connected with the armature circuit voltage and the current sensor 5 and the field circuit voltage and the current sensor 6, and the full digital keyboard 8 is connected with the micro-core processor in the controller 7 for Input reference speed; the armature circuit voltage and curre...
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The invention discloses a speed sensor-free speed regulation device and a speed sensor-free speed regulation method for a DC motor, which are suitable for rotating armature DC motors. The speed sensor-free speed regulation device comprises a controller; the input end of the controller is respectively connected with an armature circuit voltage and current sensor, an excitation circuit voltage and current sensor and a full digital keyboard, while the output end is respectively connected with an armature DC power supply and an excitation DC power supply; the armature circuit voltage and current sensor is connected with the armature DC power supply; the excitation circuit voltage and current sensor is connected with the excitation DC power supply; and the armature circuit voltage and current sensor and the excitation circuit voltage and current sensor send the respectively acquired voltage and current signals to the controller. The speed sensor is not needed; and the structure and method are simple and have high reliability.
Description
technical field [0001] The invention relates to a speed regulating device of a direct current motor, and is especially suitable for a speed regulating device of a direct current motor without a speed sensor used in a rotating armature direct current motor. Background technique [0002] In the double closed-loop control system of the DC motor, the closed-loop control link of the rotor speed needs to detect the rotational speed signal of the motor. At present, the control system of the DC motor control system is mostly composed of an uncontrolled DC excitation power supply, an armature power supply controlled by a micro-core processor, a DC motor and speed, voltage and current sensors. The DC excitation power supply is connected to the excitation winding of the motor, the armature power supply is controlled by the micro-core processor to be connected to the armature winding of the motor, and the speed sensor is coaxially connected to the motor. The micro-core processor receiv...
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IPC IPC(8): H02P7/06
Inventor 邓先明谭国俊何凤有张嘉敏宋吉王抗
Owner CHINA UNIV OF MINING & TECH