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Home ... Engineering Information in DC Brushless motors - Built-in type in Outline

DC Brushless motors - Built-in type - Outline

There are many types of vacuum pumps.
The type of vacuum pump differs according to the range of vacuum for which it is used (rough, high, or ultra-high vacuum), and the motor differs as well.
Motors used in turbo-molecular pumps for high vacuum ranges run as fast as 50,000 RPM, and motors in dry pumps used for rough vacuum ranges require low rotation speed but high torque.
High efficiency is required for both pump types, and we work continuously to develop improved products.


External View (Rotor)

External View (Stator)

Typical Features
Speed (min-1) Efficiency (%) Output (W) Stator O.D.(mm)
6,000~50,000 >90 100~3,000 ø65~ø175

Key Features

The biggest feature of our pumps is built-in design, with separate rotors and stators that are incorporated in the pumps manufactured by each respective customer.
This means that we can modify the design of the motor depending on the conditions and requirements of the pump, which will provide greater freedom to our customers in pump design.


Construction

For vacuum pump motors, DC brushless motors are generally used for smaller pumps, and AC motors are typically used for larger ones.
Most DC brushless motors that are often used in small pumps are equipped with sensors*, but there are types without sensors*.
(Recently sensorless types have been gradually becoming more common.)
The inside structure of the sensorless DC brushless motor is very similar to that of the synchronous AC motors.
Both types of DC brushless motors have become more powerful and more compact as rare-earth magnets in recent years have become more high-performance.

* sensor: hall element

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