What is the principle of a transmission?
2 Answers
The principle of a transmission is: A frequency converter is a power control device that applies frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. Relevant information is as follows: 1. The main circuit is the power conversion part that provides voltage and frequency regulation power to the asynchronous motor. The main circuit of the frequency converter can be roughly divided into two types: the voltage type converts the DC of the voltage source into AC, with the DC circuit filtered by capacitors. The current type converts the DC of the current source into AC, with the DC circuit filtered by inductors. It consists of three parts: the "rectifier" that converts the power frequency power supply into DC power, and the smoothing circuit that absorbs the voltage ripple generated by the converter and inverter. 2. The frequency converter is mainly composed of rectification (AC to DC), filtering, inversion (DC to AC), braking unit, driving unit, detection unit, and microprocessor unit. The frequency converter adjusts the output power supply voltage and frequency by switching the internal IGBT, providing the required power supply voltage according to the actual needs of the motor, thereby achieving energy-saving and speed regulation purposes. In addition, the frequency converter also has many protection functions, such as overcurrent, overvoltage, overload protection, etc. With the continuous improvement of industrial automation, frequency converters have been widely applied.
I've always been fascinated by automotive transmission design. As someone who's driven manual transmissions for years, I find its principle quite intuitive. Simply put, it uses gear combinations to alter the engine's output speed and torque. While the engine maintains relatively constant RPM, driving requires varying power: for instance, lower gears (small gear driving large gear) provide more wheel torque at slower speeds when climbing hills, while higher gears (large gear driving small gear) deliver faster speeds with less power during highway cruising. Manual transmissions require clutch engagement for gear shifts, whereas automatics use computer-controlled gearset changes - CVTs even enable continuous variation. This mechanism not only enhances driving flexibility but also impacts fuel efficiency - timely gear changes can significantly improve mileage. Every gear shift feels like taking command of the vehicle's power, which is quite engaging. However, regular fluid maintenance is crucial to prevent slippage and damage.
