Rate gyro electrical control and indicator system
阅读：306发布：2023-06-07
专利汇可以提供Rate gyro electrical control and indicator system专利检索，专利查询，专利分析的服务。并且An electrical control and indicator system for a rate gyro of the kind comprising a synchronous AC spin motor and a pickoff device for developing two AC turn rate analog signals, comprising a motor start control circuit for switching a starting capacitor into and out of the motor circuit in response to changes in the stator voltages. The system further includes an inverter power supply with driver and switch circuits to energize the motor from a DC source without appreciable loading of the inverter. The demodulator of the system is a balanced differential rectifying amplifier comprising two cross-connected emitter follower stages each using a transistor as the load impedance for the emitter follower. The start control circuit, the inverter power supply, and the demodulator all comprise a single noninductive integrated silicon circuit.，下面是Rate gyro electrical control and indicator system专利的具体信息内容。
1. An electrical control and indicator system for a rate gyro of the kind comprising a DC power supply, an AC spin motor including a rotor inductively coupled to a plurality of stator windings and a starting capacitor electrically connectEd to one of said stator windings in a starting circuit, and a pickoff device for developing first and second AC analog signals that vary in amplitude, relative to each other, as an analog of the turn rate input to the gyro, said system comprising: a start control circuit including a normally conductive triac connected in series with said starting capacitor, a sensing circuit for developing a start control signal representative of the voltage across said one stator winding, and gating means for actuating said triac to nonconductive condition whenever said start control signal exceeds a given amplitude; an inverter power supply for said spin motor comprising a stable-frequency oscillator energized from said DC power supply, a pair of driver amplifiers actuated by said oscillator to develop two synchronous AC drive signals of rectangular waveform, and a pair of complementarily symmetrical switching circuits each responsive to one of said drive signals, for developing a full-wave output signal of generally rectangular waveform for energizing said spin motor; and a demodulator, coupled to said pickoff device, comprising a balanced differential rectifying amplifier for developing a DC analog of the turn rate input to said gyro from said AC analog signals, each half of said differential amplifier including an amplifier transistor having a load transistor as its principal load impedance and having a gating circuit for controlling the conductivity of the load transistor in accordance with the conductivity of the amplifier transistor in the other half of the amplifier; substantially all of said start control circuit, said inverter power supply, and said demodulator comprising a single, noninductive integrated silicon circuit.
2. An electrical control and indicator system for a rate gyro, according to claim 1, in which said sensing circuit comprises a voltage divider connected from the end terminal of one stator winding to a plane of reference potential, and in which said gating means for said start control circuit includes a normally conductive gate transistor connected in series with the gate electrode of said triac, and a normally nonconductive auxiliary gate transistor connected to said gate transistor and to said voltage divider, said auxiliary gate transistor being driven conductive and actuating said gate transistor to cut off whenever said start control signal exceeds said given amplitude.
3. An electrical control and indicator system for a rate gyro, according to claim 1, in which said inverter power supply driver amplifiers each include a single transistor, said drive signals being displaced 180* in phase relative to each other, and in which said switching circuits each include two complementary transistors, all of said transistors having a single collector supply.
4. An electrical control and indicator system for a rate gyro, according to claim 1, in which each half of said demodulator is an emitter follower with the load transistor connected between the emitter of the amplifier transistor and the DC power supply, and in which each gating circuit comprises a resistor connecting the emitter of the amplifier transistor in one half of the demodulator to the base of the load transistor in the other half of the demodulator.
5. A control system for a rate gyro of the kind comprising an AC spin motor including a rotor inductively coupled to a plurality of stator windings and a starting capacitor electrically connected to one of said stator windings in a starting circuit, said control system comprising: a semiconductor gate device normally biased to conductive condition and comprising input and output electrodes connected in series with said starting capacitor in said starting circuit, and further comprising a gate electrode; a sensing circuit, electrically one stator winding, for developing a start control signal having an amplitude representative of the instantaneous voltage across at least one of said stator wiNdings; and a gating circuit, coupling said sensing circuit to said gate electrode, for actuating said gate device to a nonconductive condition whenever the voltage across said stator winding exceeds a given value indicative of a predetermined motor speed; said gate device being a triac, and said gating circuit comprising a gate transistor connected in series with said gate electrode and actuated between an initial conductive condition and a nonconductive condition in response to variations in said start control signal above and below a given amplitude representative of said predetermined motor speed.
6. A rate gyro control system according to claim 5 in which said sensing circuit comprises a resistive voltage divider connected from the end terminal of one stator winding to a plane of reference potential, and in which said gating circuit further comprises an auxiliary gate transistor connected to the base of said gate transistor, the base of said auxiliary gate transistor being connected to said voltage divider.
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