- Industry: Electrical equipment
- Number of terms: 62
- Number of blossaries: 0
- Company Profile:
The Motor & Motion Association is the manufacturing trade association for the electric motor and motion control industries. It promotes the electric motor industry through education, pre-competitive research and facilitation of technology transfer within the industry and in cooperation with ...
The maximum current limit beyond which demagnetization of the permanent magnet field (in a PM motor) will occur (at 20°C).
Industry:Electrical equipment
The ratio of the motor torque to motor input power. It is measured in Nm/W or oz.in./W.
Industry:Electrical equipment
The angular distance in electrical degrees between magnet poles or field poles. It is the theoretical space in which field flux is zero.
Industry:Electrical equipment
The current generated at rated voltage with no load on the motor – a function of rotation losses, both electrical and mechanical.
Industry:Electrical equipment
The actual speed the motor will run with no load applied at rated voltage.
Industry:Electrical equipment
A theoretical speed to which the motor will rise when rated voltage is applied with no load. This speed is based on the point where back emf is equal to input voltage.
Industry:Electrical equipment
The maximum torque capability of a motor based on the maximum current limit (Im). Tpk = KtIm.
Industry:Electrical equipment
Power loss due to energy expended in the motor stator and rotor. It appears as heat and is expressed in watts. Pd = Pin-Po
Industry:Electrical equipment
(Synchronous motors) Pull-in torque is obtained by starting the motor from rest at a pre-set torque value and specified motor terminal voltage. The maximum torque setting which the motor will accelerate to synchronous speed is the pull-in torque. Since the inertia of the connected load greatly affects the pull-in torque, this test should be run with minimum external inertia.
Industry:Electrical equipment
(Synchronous motors) Pull-out torque is obtained by steadily increasing the load torque from the normal operating range of a synchronous motor while maintaining specified terminal voltage. The maximum torque reading obtained without having caused the speed to drop from synchronous speed is the pull-out torque.
Industry:Electrical equipment
