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Speed Variators

A speed is a device that can change its parameters, or can change parameters of other devices. Often a variator is a mechanical power transmission device that can change its gear ratio continuously (rather than in steps).

A speed variator is equipment for continuously varying the speed and gear ratio of an engine. It allows the engine to produce maximum power over a range of speeds. Its primary function is to control the engine's output speed. As the torque increases, the output speed decreases, and vice versa. A speed variator is used to maintain the efficiency of the engine and to save fuel. HZPT is one of the professional manufacturers and suppliers in China. Get the china speed variators at low prices. Contact us now!

What Does a Variable Speed Drive Do?

Variable speed drives control mechanical motion. The variable speed electric gear motor helps to save energy and money by reducing motor output. For instance, heating and cooling systems powered by don't always need to run at full capacity. Instead, they should run at a lower speed until a certain temperature is reached. Without a variable speed transmission gearbox, these systems would not have the ability to regulate their performance or deviate from their maximum operating speed.

Mechanical stepless speed variators come in a variety of types and ratings, from less than a single horsepower up to thousands of horsepower. These devices can be controlled by a PLC or manually. They help businesses tighten control of their processes, increase productivity, and save money on electricity and maintenance.

Most VFD variable speed drives can be programmed to automatically start and stop. They begin operating with a low frequency or voltage to avoid the high inrush current associated with direct on line starting. Then they ramp up to a desired speed or frequency when the load increases. In this way, the motor can develop up to 150% of its rated torque while drawing less than half its rated current from the mains. These devices also have a debugging feature that allows you to identify faulty components or adjust motor parameters.

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How Does a Variable Speed Drive Work?

A variable-speed drive is a device that can vary its speed depending on the requirements of the application. It is composed of a fixed-speed motor and a variable-speed rotor. These components operate through the regulated activation of a field coil. This coil generates a magnetic field and transmits it to the input or output rotor. The intensity of the magnetic field affects the speed. The output speed can be controlled by using an AC tachometer.

A variable-speed drive motor uses electromagnetic and mechanical forces to control the speed of the rotor and stator. The electromagnetic forces act on the rotor bearings to adjust its speed and torque. In addition, the power supply used by the drive also affects the frequency. This means that it can be used for demanding applications.

Mechanical Variable Speed Gearbox
Variable Speed Reducer Gearbox

The Mechanical Speed Variator Principle

А is a general-purpose speed changer. It is a mechanical device that varies the output speed of a machine by using within the machine. Its working principle is much simpler than hydraulic variators. The mechanical speed variator works by varying the ratios of gears to change the output speed and torque.

The principle behind a mechanical speed variator is the same for manual and electric ones. The difference is in the design. A mechanical variable speed drive consists of a clutch system and gears that are arranged in a gear train. The gears in the chain act on the output and change the output speed. Depending on the input speed, the output speed can be varied from a slow speed to a high speed.