DC motor speed-regulation device and method

Abstract

The invention discloses a DC motor speed-regulation device for a drilling platform. The device comprises a rectifier module including a thyristor; a control module including a DC speed regulator and apulse amplifier, wherein one end of the pulse amplifier is connected with the DC speed regulator, and the other end is connected to the thyristor; the DC speed regulator comprises a rotating speed actual value collecting module, a speed closed loop control module, a torque limiting component, a current limiting component and a current closed loop control component connected in order; and an actual collection component connected with the current closed loop control component, wherein the DC speed regulator is connected with the DC motor. The invention further discloses a DC motor speed-regulation method. The DC motor is controlled by adopting a way of combining the DC speed regulator and the pulse amplifier;, the rotating speed of the DC motor is monitored in real time, and a torque sensoris increased between the drilling motor and a drilling rig to collect the torque data in real time, thereby reaching the aims of outputting different torques of different geological conditions, reducing the loss of a transmission system, lowering a well drilling cost, and saving energy.

Description

technical field [0001] The invention relates to a DC motor speed regulating device and method, in particular to a DC motor speed regulating device and method for an oil-to-electric drive system on a drilling platform. Background technique [0002] The original drilling platform uses two diesel engines as the power source to drive the actuators of the drilling platform through the transmission system. The diesel engine is noisy, pollutes heavily, requires a lot of maintenance, and consumes a lot of energy. The torque and speed can only be controlled by the throttle, and the motor speed cannot be accurately controlled. At the same time, the synchronization of the two diesel engines is poor, the speed regulation accuracy is low and there is no speed feedback, and the speed regulation needs to be adjusted through an external transmission system. The DC motor is now used as a new power source to replace the original diesel engine. The speed control of the DC motor is generally di...

AI Technical Summary

Problems solved by technology

[0002] The original drilling platform uses two diesel engines as the power source to drive the actuators of the drilling platform through the transmission system. The diesel engine is noisy, pollutes heavily, requires a lot of maintenance, and consumes high energy. At the same time, the synchronization of the two diesel engines is poor, the speed regulation accuracy is low and there is no speed feedback, and the speed regulation needs to be adjusted through an external transmission system

The DC motor is now used as a new power source to replace the original diesel engine. The speed control of the DC motor is usually directly controlled by the governor, which is limited by the power of the governor, which greatly increases the cost.

[0003] Moreover, the existing DC motor speed control system applied to the drilling platform has no torque tracking system, and cannot change the torque output (such as drilling depth and rock) according to underground geological changes. Burning drill or power system damage

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