SU664099A1 - Method of measuring angular speed of all-purpose electric motors - Google Patents

Description

Gatel and remove from it the output signal of another frequency.

ria drawing shows a device that implements the proposed method.

Two voltages are applied to the field winding 1 of the motor: voltage U with frequency {and voltage Og. tji frequency . Anchor 2 is fed through the filter 3 only with Voltage having frequency Ij. Filter 3 for passing voltage t J must have a low resistance,

and for voltage, ijt, with a large matching. If, for example, the frequency is chosen equal to zero, i.e., and 2 is a constant voltage -: vessel, then a condensation bar can be used as a filter.

As a result of the fact that the voltage of the same frequency is applied to the excitation and the measles, measles is thrown into the soil. Voltage l} applied to the field winding creates a magnetic flux. When the core rotates in this magnetic flux in the cortex, an emf is induced. EZY ,, with a frequency equal to the voltage frequency llg. factors that influence the useful signal. In particular.

664099

if {g O, then a constant filter, made of 3 types of capacitor, is induced in the cortex, prevents current flow from this constant EMF. According to the measured value of the EMF, the angular velocity of the electric motor core is determined.

Preliminary tests of the method showed that the accuracy of the measurement of the angular velocity .Yy improved more than that at the rated power consumed by the electric motor.

Claims (2)

1.OnatsezvichM. Permanent power supply & g. current, Radio, 1969, 7, p. 38 2. USSR author's certificate No. 226984, cl. G 01 P 3/46, 1966, -j V