Brushless Motor Specifications

Description of Specification Items

Rated Output Power

This refers to, with the combination of the motor and the driver, the amount of work that can be performed by a motor in a given period of time. It expresses the maximum output that can be generated continuously.

Maximum Input Current

This refers to, with the combination of the motor and the driver, the maximum current sent into the driver.

Rated Torque

This refers to, with the combination of the motor and the driver, the maximum torque created when they are in continuous operation.

Maximum Instantaneous Torque

This refers to, with the combination of the motor and the driver, the limit of torque that can be generated instantaneously.

Permissible Torque

Indicates the magnitude of load torque that can be driven by the gearhead output shaft.

Rated Speed

This refers to, with the combination of the motor and the driver, the speed at rated output power.

Speed Control Range

This refers to, with the combination of the motor and the driver, the range of variable speed.

Permissible Inertia J

For round shaft type

This refers to, with the combination of the motor and the driver, the maximum load inertia that can be driven.

When gearhead is connected, such as in geared type or combination type

When a high inertia (J) is connected to a gearhead, high torque is exerted instantaneously on the gearhead when starting in frequent, intermittent operations (or when stopped by an electromagnetic brake, or when stopped by a brake pack, etc.). Excessive impact loads may result in damage to the gearhead and motor.
The permissible inertia for three-phase motors is the value when reversing after a stop.
The lifetime is 2,000,000 cycles when operating permissible inertia using electromagnetic brake motors, brake packs, and speed control motors with instantaneous stop.

Speed Regulation

This shows how much the speed is affected by the change in load, voltage, and temperature.

Electromagnetic Brake Static Friction Torque (Motor shaft)

Indicates the static friction torque of an electromagnetic brake (power off activated type), representing the magnitude of the holding torque at the motor output shaft.

Gearhead Maximum Permissible Torque

Output torque of the gearhead increases in proportion to the increase in the gear ratio.
However, the size of the load torque applied to the gearhead is saturated at a certain gear ratio because of the gear material and other conditions. This torque is called the maximum permissible torque.

How to Read Speed - Torque Characteristics

① Continuous Duty Region

The region where a motor can be operated continuously. The region is used for the frictional load torque at the sliding portion of equipment during constant speed operation of the motor.

② Limited Duty Region

The region which can be used for a short period of time. If operated for more than 5 seconds in the limited duty region, the overload protective function engages and the motor is automatically stopped.
This region is used as the acceleration torque which accelerates an load inertia up to the set speed at motor start-up.