SU426200A1 - DEVICE FOR MEASUREMENT AND REGISTRATION OF THE CORNER OF THE CONSIDERATION OF A MULTIPHONE ELECTRICAL MACHINE 1F0 and ENS: and ^ i • - •• 5jg "" * i "" "" "wiaeas ( - Google Patents

Description

one

The invention relates to devices for measuring and recording the angle of mismatch of multi-phase electric machines in closed-loop control systems of a multi-phase synchronous machine.

At present, various devices are used to measure and record the error angle of multiphase electric machines, containing a phase e as sensor. d. this machine is an auxiliary synchronous machine, mechanically connected to the controlled machine and having the same number of pole pairs as the controlled one, and the same number of rotor phases, phase detector as a phase angle converter into an electrical signal that is a function of this angle, and measuring and registering authority. Such devices are not applicable for measuring the error angle of synchronous machines with an excitation field (dual power machines) rotating relative to the rotor.

To obtain the possibility of using the device in synchronous dual-power machines, the windings of the monitored and auxiliary machines of the proposed device are connected to a common power source, and the input of the phase detector, which is a multiphase-ring phase detector, is connected to the stator windings of the controlled and auxiliary machines.

The drawing shows schematically the described device.

The device contains as a phase sensor e. d. main machine low-power synchronous machine, mechanically connected with the main machine, transducer and measuring and recording body. Sensor

has the same number of pole pairs with the main machine, the same number of stator phases with the stator of the main machine and the same number of rotor phases with the main machine rotor. Rotor 1 and sensor stator 2 mechanically

rigidly connected respectively to the rotor 3 and the stator 4 of the main machine, and the rotor winding 1 of the sensor receives power from the same source as the rotor winding 3 of the main machine.

In order to expand the applicability of the device in the investigation of synchronous machines with different number of poles, the sensor can be made with windings that allow the number of pairs of poles to vary in accordance with the zero pole of the main machine. At different numbers of the pole pairs of the main machine and the sensor, the gearbox is turned on as a matching link between their shafts. As a converter, at the output of which a chipoic signal is generated,

corresponding to the misalignment angle of the main machine, a multiphase ring phase detector 5 is used. One group of input terminals of this detector is connected to the stator terminals 4 of the main machine, the other to the stator winding terminals 2 sensors, and the output terminals to the measuring and detecting organ 6.

Perform phase sensor e. d. the main machine is similar to this machine and connecting it in the above manner allows to obtain at the terminals of the stator winding of the sensor at any synchronous speed vrah, eni shaft, including at a speed equal to zero, the voltage of the same frequency as the voltage applied to the stator of the main machine, with a phase shift between the indicated voltages at the misalignment angle, determined mainly by the load of the multiphase synchronous machine.

The use of a multiphase ring phase detector as a converter, to the input of which the stator windings of the main machine and the phase sensor e are supplied. d. This machine allows to obtain at the output of this converter an electrical signal corresponding to its phase angle between the indicated voltages, i.e. the error angle of the main machine. Since a multiphase phase detector of any type provides a small level of ripple in the output voltage curve and without smoothing, its filter, the device has a high speed.

Subject invention

An apparatus for measuring and recording the error angle of a multi-phase electric machine, comprising, as a phase sensor e. d. This machine is an auxiliary synchronous machine, mechanically connected

with a machine controlled and having the same number of pole pairs as the one being controlled, the same number of rotor phases, a phase detector as a phase angle transducer into an electrical signal that is a function

of this angle, and the measuring and registering organ, characterized in that, in order to be able to use the device in dual-feed synchronous machines, the same type windings of the rotors are controlled

and auxiliary machines are connected to a common power source, and the input of the phase detector, which is a multiphase ring phase detector, is connected to the stator windings of the monitored and auxiliary machines.