Abstract:
An electronic system for automatically operating the power-operated windows and roof panel in a motor vehicle. Also to provide driver and occupant safety and co]fort by controlling the vehicle's radio/stereo system, air conditioning/climate control system and other selected systems in response to calls placed or received on the vehicle's cellular phone or in response to changes in the vehicle's interior or exterior environment or both.
Abstract:
A motor driving circuit capable of driving a motor with a single circuit regardless of whether the motor used is a brush motor or a brushless motor. The circuit detects a speed error between actual speed and commanded speed of the motor and provides a speed error signal. An inversion circuit selectively inverts or non-inverts the speed error signal in response to the type of the motor and desired motor rotation direction. When a brushless motor is used, the non-inverted error signal is employed for controlling driving of the motor. When a brush motor is used, the inverted speed error signal is employed.
Abstract:
A controlling device for an automobile motor driven antenna including a motor for extending and retracting an antenna by the power from a battery, and a control circuit for controlling the power. The control circuit includes a current detector for detecting the power flowing into and out of the motor and a current breaker which breaks the current when it is over a predesignated level so that a pair of relay contacts in the circuit changes the direction of the current so that the motor may make a forward or reverse rotation for extending or retracting the antenna and automatically make a stop of such rotation.
Abstract:
An antenna motor drive system for raising and lowering an antenna. Response to a user input for raising or lowering a vehicle antenna is delayed to avoid rapid reversals of the antenna drive motor. This avoids the large surge currents associated with the prior art. The circuit monitors drive circuit response and de-energizes the motor if an inappropriate response is sensed after a certain period. Use of switching transistors rather than a relay facilitates implementation of the invention in integrated circuit form.
Abstract:
A control for controlling the operation of a direct current motor by select application of a three phase alternating current line input of given frequency to the armature thereof through solid-state forward and reverse designated switches which are gated by select enable inputs.
Abstract:
A control system for a reciprocating drive motor includes a phase comparator which determines a difference in phase between pulses synchronous with the rotation of a motor and reference pulses whose period corresponds to a specified velocity, to produce a pulse while any phase difference exists and in accordance with the advancement/retardation of the phase. A charge pump circuit is connected between the phase comparator and a loop filter of the control system to produce a voltage which is zero level when the phase difference is zero, and positive (negative) or negative (positive) with respect to the zero level in accordance with the advancement/retardation of the phase. Until the motor enters a constant velocity control mode, the output of the loop filter is maintained zero level by switching means. In a constant velocity control mode, while the phase difference is zero (meaning that the motor is in rotation at a specified velocity), the output voltages of the charge pump and loop filter are kept zero level regardless of the specified velocity. When the operation mode shifts from a start mode to a constant velocity control mode, the output voltage of the loop filter is held zero level regardless of the specified velocity. The control system further includes compensation voltage supply means for energizing the motor with a current large enough to overcome frictional forces of a system which is driven by the motor.
Abstract:
The present invention relates to a linear integrated circuit for driving a d.c. motor with remote radio control comprising an amplifier B.sub.1 to amplify the signal transmitted by the transmitter, a peak detector B.sub.2 detecting the said signal, a comparator B.sub.3 triggered by the d.c. output voltage of the said detector, transistors Q.sub.1 ', Q.sub.2 ' of the driving stage circuit B.sub.4, which can invert the driving direction of the d.c. motor by on or off operation of the said transistors in accordance with the output voltage of the said comparators, a voltage regulator circuit B.sub.5 and a thermal protection circuit B.sub.6 stabilizing the said transistors thermally.
Abstract:
An electronic speed controller for a radio controlled model has conversion circuitry to derive a dc signal having a level that is proportional to the information pulse width of the radio control signal, but which is insensitive to changes in the frame rate thereof. This dc signal level is compared with a reference triangular wave to obtain a digital control signal having a duty cycle proportional to the information pulse width. This signal is used to gate battery voltage to the motor, thereby to control its speed.In one embodiment, the battery voltage is supplied to the motor via a power transistor. A switching regulator connected between the motor battery and the base of the power transistor provides sufficient base current to drive that transistor into saturation regardless of the motor battery voltage, and with the base current responsive to the Vbe of that transistor. The regulator is gated on by the digital control signal. In another embodiment, battery voltage is supplied to the motor via a power transistor bridge. One or the other pair of bridge transistors is turned on by the digital control signal, which in this embodiment is a three-level signal having a polarity dependent on whether the information pulse width is above or below a certain mid-range value. The gating circuitry provides constant base drive current to the pair of bridge transistors that is turned on.
Abstract:
A bi-directional motor drive circuit has a single input terminal and first and second terminals having a reversible DC electric motor connected therebetween. Also, the circuit is provided with third and fourth terminals for connection to voltage sources of unequal positive potential such that the voltage supplied to the third terminal is at higher potential than that supplied to the fourth terminal. Further, the fourth terminal is connected to the second terminal. The circuit splits into first and second branches. The first branch includes a first NPN transistor and a second PNP transistor. The second branch includes third and fourth NPN transistors. The respective transistors of each of the branches are so arranged with one another and with respect to the input, voltage supply and motor-connected terminals such that upon application of a "high" level signal to the input terminal of the circuit the motor is driven in a first direction, while upon application of a "low" level signal to the input terminal of the circuit the motor is driven in a second, opposite direction.
Abstract:
A pulse width modulated motor control system in which the power supplies for forward and reverse operation for the motor are provided to supply electric energy at different levels. The control signals for the motor are provided in such a manner that the average energy of unbalanced pulse periods is the same, but the potential level differs by a substantial amount. Energy storage may be provided for in conjunction with the lesser of the two power supplies to assist in a rapid reversal, stop or shaft positioning of the motor.