Motors

Motors

Industry: Electrical equipment

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Motors

magnetic field intensity (H)

Electrical equipment; Motors

The vector magnetic quantity that determines the ability of an electric current or a magnetic body to induce a magnetic field at a given point. It is measured in oersterds, amps turns/inch or ...

maximum current (Im)

Electrical equipment; Motors

The maximum current limit beyond which demagnetization of the permanent magnet field (in a PM motor) will occur (at 20°C).

motor constant (Km)

Electrical equipment; Motors

The ratio of the motor torque to motor input power. It is measured in Nm/W or oz.in./W.

neutral zone

Electrical equipment; Motors

The angular distance in electrical degrees between magnet poles or field poles. It is the theoretical space in which field flux is zero.

no load current (Inl)

Electrical equipment; Motors

The current generated at rated voltage with no load on the motor – a function of rotation losses, both electrical and mechanical.

no load speed-actual (No)

Electrical equipment; Motors

The actual speed the motor will run with no load applied at rated voltage.

no load speed-true (Nlo)

Electrical equipment; Motors

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.