CS251529B1 - Electric dial indicator - Google Patents

Abstract

The electric remote tachometer consists of a mutually electrically connected multi-phase transmitter and a multi-phase indicator with a rotating magnetic field. A line-passing filter and a thermal or electromagnetic sealing rod are serially included in the alternating current electrical circuit of each phase, which allows the commonly used alternator of the electrical power supply system to be used as a multi-phase transmitter of the electric remote tachometer for the purposes of measuring revolutions, e.g. of a combustion engine in vehicles.

Description

4 251529

BACKGROUND OF THE INVENTION The present invention relates to an electric dial counter comprising a multiphase transmitter and a multi-phase pointer to a magnetic field and solves their electrical interconnection.

Until now, the electrical interconnection of the multi-phase transmitter and the multi-phase pointer with rotating magnetic radius has been directly coupled to both the winding and winding lines of each phase. This solution assumes a harmonious passage of the AC output voltage of the multi-phase transmitter. This condition does not necessarily have to be fulfilled in its entirety by rotating in dedicated multi-phase transmitters.

The non-harmonious course of the alternating output voltage of the multi-phase transmitter will be shown by reducing the linearity and torque of the multi-phase pointer by a rotating magnetic field. This example, alk is a multi-phase transmitter combined with electronic circuits, e.g., with an additional electronic commutator. The connecting electrical line between the multi-phase transmitter and the multi-phase indicator can also be a source of electromagnetic radiation. In the case of using a multiphase transmitter with sufficient output power, the direct electrical connection to the multi-phase indicator with rotating magnetic field does not solve the circuit protection against impermeable current.

The above-mentioned disadvantages are alleviated by the solution of the e-electronic dial-up indicator. The essence of this is that a low-pass filter and a thermal or electromagnetic locking element are arranged in the circumferential current, between each winding outlet of each transmitting phase of the multi-phase transmitter and one of the winding outlets of each receiving phase of the multi-phase pointer by the coil magnetic field. It is also within the scope of the invention that the multi-phase transmitter is an alternator of the e-drug source system. It is essential that the thermal protector is formed by a resistor. It is also within the scope of the invention that the thermal protector is a variator or a bulb with a metal fiber.

For example, the preamble of the invention is that, in the case of measuring the propulsion gear revolutions, by mechanical transmission coupled by the power source alternator, the alternator can also be used to measure propulsion machine speed. Thereby, a special multi-phase transmitter of the same purpose is used with the obvious beneficial effects while maintaining the measurement accuracy.

In the accompanying drawing, one example of a mutual electrical interconnection of a multi-phase transmitter formed by an alternator of an electrical apparatus system with a multi-phase curved magnetic indicator according to the invention is shown schematically.

The multiphase transmitter 10, in particular the three-phase alternator in the motor vehicles of the commonly used schematically illustrated electric power supply system 20, is provided with three outlets 11, 12, 13 for each of the three transmitting phases 01, 92.03 connected to the star.

The multi-phase pointer 30 with a rotating magnetic field is, in particular, formed by a three-phase winding of the receiving phases 1, 2, 3, e.g. a synchronous motor, also connected to a star and provided with three outlets 31, 32, 33.

Three low-pass filters 41, 42 are connected in series to three alternating current circuits formed after each of one of the outputs 11, 12, 13 of the multiphase transmitter 10a by one of the outlets 31, 32, 33 of the multi-phase indicator 30 with a rotating magnetic field. 43 and three thermal or electromagnetic locking elements 51, 52, 53.

A three-phase alternating current with a substantially clockwise measured object and a mechanical transmission of the coupled lithium-phase transmitter 10 after removal of undesired frequency components in the three low-pass filters 41, 42, which also exhibit the anti-interference effect of the electromagnetic radiation of the coupling. guiding and passing through the thermal or electromagnetic protection elements 51, 52, 53 causes the flow of the reciprocating phases 1, 2, 3 of the multi-phase thrust generator 30 with a rotating magnetic field, in its system a torque directly proportional to the measured object speed, which is indicated as angular pointer deflection directly proportional to the measured value.

The three thermal or electromagnetic security elements 51, 52, 53 provide a protective phase transmitter 10 against the occurrence of excessive AC current and a short circuit in each of the three circuits. In a particular case, they are posistors, i.e. semiconductor resistors with a strong positive temperature coefficient of resistance.

With the low-pass filters 41, 42, 43, the electric remote turntable can also be operated with the simplest multi-phase transmitter 10 implemented, e.g., by controlled electronic switches in a multiphase arrangement, with the timing of overlapping the closed state corresponding to the multiphase approximation. a harmonious waveform of pulsed waveforms.

Claims (4)

I 251529 5 ηΖ31γΝΛΛ 1. An electric remote counter, remaining ο · ο an electrically coupled multi-phase emitter and a multi-phase rotary magnetic field detector, characterized in that each winding terminal (11, 12, 13) of each transmitting the phase (01, 02, 03) of the multiphase transmitter (10) and one of the outputs (31, 32, 33) of the winding of each receiver phase (1, 2, 3) of the multi-phase pointer (30) with a rotating magnetic field low pass filter (41, 42, 43) and thermal or electromagnetic detector (51, 52, 53}. iawaaaa) 2. An electric diaphragm tachometer according to claim 1, wherein the multiphase transducer (10) is an alternator of the electrical source system (20). 3. The electric dial indicator of subdivisions 1 and 2, characterized in that the heat-conducting element (51, 52, 53) is formed by a resistor. 4. An electrical dial-up counter of subdivisions 1 and 2, characterized in that the heat-conducting element (51, 52, 53) is a multi-torque or metal-filament lamp. 1 datasheet drawing