8 results about "Battery voltage" patented technology

The invention relates to an automotive active engine mount capable of energy regeneration and transmitting force perception. The automotive active engine mount consists of an active engine mount actuator body and a control circuit system, wherein the active engine mount actuator body mainly consists of rubber springs, a base, a position-fixing pin, a metal framework, an electromagnetic linear module and a piezoelectric module; the upper end and the lower end of the active engine mount actuator body are respectively connected with an engine body and an automobile frame through connecting bolts;and an actuator control system mainly consists of an energy recovery module, a controller, a storage battery voltage sensor, a controllable current source, a rotating speed sensor, a force sensor, anactuator energy regeneration voltage sensor and a relay. The invention also relates to a control method of the automotive active engine mount. The automotive active engine mount is novel in structureand high in practicability and is capable of significantly reducing the impact of engine vibration on a chassis and the automobile body, improving the ride comfort of an automobile, reducing the noise in the automobile, recovering the energy of the engine vibration, reducing the energy consumption of the automobile and achieving the purpose of improving the performance of the entire automobile while reducing the energy consumption.

The embodiment of the invention discloses a vehicle-mounted diagnostic device dormancy starting circuit comprising a storage battery voltage adjusting module and a level signal conversion module. The input end of the storage battery voltage adjusting module is connected with a positive pole of an automobile storage battery, the output end of the storage battery voltage adjusting module is connected with the input end of the level signal conversion module, and the storage battery voltage adjusting module is used for reducing a voltage output by the automobile storage battery to a value within a preset voltage interval and then outputting the voltage through the output end of the storage battery voltage adjusting module when the voltage output by the automobile storage battery is larger than or equal to a first preset voltage. When the voltage output by the automobile storage battery is smaller than the first preset voltage, the output voltage of the storage battery voltage adjusting module is zero. The output end of the level signal conversion module is connected with a dormancy awakening terminal of a vehicle-mounted diagnostic device and used for outputting a logic low level when a voltage input by the input end of the level signal conversion module is larger than or equal to a second preset voltage. When the voltage input by the input end of the level signal conversion module is smaller than the second preset voltage, the output end of the level signal conversion module outputs a logic high level. According to the technical scheme of the vehicle-mounted diagnostic device dormancy starting circuit, the effect of reducing dormancy power consumption of the vehicle-mounted diagnostic device can be achieved.

A pocket-size digital milliohmmeter comprises a box, a liquid crystal screen, an 'on' switch, an 'off' switch, a gear switch, a 'zeroing' knob, two binding posts, two measuring probes and a circuit. Three built-in 1.5V triple-A batteries are serially connected to form an integral 4.5V power source, working voltage conditions and excellent matching of an analog-to-digital converter, the liquid crystal screen and a high-precision constant-current source are realized by the aid of an electronic timing switch, a mirror negative-voltage generator, a battery voltage monitor, a decimal point converter and two high-current silicon diodes, and electric resistance ranging from 0 to 1.999ohm and electric resistance ranging from 0 to 199.9ohm can be measured by two gears with the resolution ratio of 0.001ohm and 0.1ohm. The pocket-size digital milliohmmeter can be conveniently used in indoor and field places without mains power fields, and brings convenience for detecting electric resistance of motors, transformer windings, wires, cables and printing lines of circuit boards.

The invention discloses an electronic steering column lock power supply system and method. The system comprises a PEPS module, wherein the PEPS module comprises a PEPS control unit and a low-side driving chip; the power supply input end of the PEPS module is connected with automobile storage battery voltage; the power supply output end of the PEPS module is connected to the power supply input end of an electronic steering column lock; the PEPS control unit is used for controlling the PEPS module to supply power to the electronic steering column lock; the PEPS control unit is connected with the low-side driving chip; the output end of the low-side driving chip is connected with the electronic steering column lock; and the low-side driving chip is used for driving the unlocking and locking of the electronic steering column lock according to a control signal of the PEPS control unit. The electronic steering column lock power supply system has the advantages that the power supply mode of the electronic steering column lock is changed, the electronic steering column lock is powered in a PEPS module power taking mode, and damage to an IGN relay caused by power taking in an IGN relay mode in the prior art is avoided.

The present invention discloses a radio frequency switching circuit with an improved bias circuit. The radio frequency switching circuit comprises a first radio frequency end, a second radio frequency end, a first capacitor, a second capacitor, a radio frequency switch and a bias circuit; the radio frequency switch includes a source, a drain, a gate and an end body, wherein the source is coupled to the first radio frequency end through the first capacitor, the drain is coupled to the second radio frequency end through the second capacitor; and the bias circuit provides first bias voltage, second bias voltage and third bias voltage based on battery voltage, wherein the first bias voltage is larger than the second bias voltage, the second bias voltage is larger than the third bias voltage, and the second bias voltage is coupled to the source and drain of the radio frequency switch; when the radio frequency switch is required to be controlled to be switched on, the first bias voltage is coupled to the gate of the radio frequency switch, and the second bias voltage is coupled to the end body end of the radio frequency switch; and when the radio frequency switch is required to be controlled to be switched off, the third bias voltage is coupled to the gate and end body of the radio frequency switch. Thus, the area of a chip can be decreased, and costs can be reduced.