48results about How to "Realize frequency conversion control" patented technology

The invention discloses a power supply controller for an electromagnetic heating steam generator, comprising: a processor for collecting steam parameters and generating analog signals according to the parameters; a main power supply with a communication module for receiving Analog signal and real-time control of the output power according to the analog signal; the isolator, including a primary isolation transformer and a secondary isolation heater, used to connect the main power supply and the steam generator; the input end of the primary isolation transformer is connected to the main power supply , the output end is connected to the secondary isolation heater, which converts the electrical energy of the main power supply into magnetic energy and transmits it to the secondary isolation heater; the secondary isolation heater is distributed on the water pipeline of the steam generator, and converts the magnetic energy into induced eddy currents Heating water produces steam. It truly realizes the separation of water and electricity heating technology. Compared with gas and ordinary electric heating, the safety is greatly improved, the volume is smaller, and the equipment is convenient.

The invention provides a vehicle air conditioner frequency conversion control system and a method thereof. A vehicle DC power supply is led directly; a stabilized voltage supply of the air conditioner is used to directly output a DC to a converter plant; each set of frequency transformators of the converter plant provides a threephase AC to a system unit of the air conditioner to drive each system unit of the conditioner to run in a mode of frequency conversion. The invention realizes the simplification of the conversion process of the vehicle air conditioner using the power supply, effectively reduces the energy consumption, raises the utilization efficiency of the power supply, greatly reduces the capacity of the power supply transfer device on the vehicle and reduces the volume of the air conditioner control circuit. The stabilized voltage supply of a voltage control module is directly led to the vehicle DC power supply; the DC power output terminal of the stabilized voltage supplyis directly connected with the converter plant which is connected with an MCU by an asynchronous communication bus. The converter plant at least comprises two sets of frequency transformators; the power supply input terminals between frequency transformators are connected in parallel and are connected with the MCU by a common communication bus.

The invention discloses an intelligent voice remote control device for a mobile crane. The intelligent voice remote control device of the mobile crane is composed of a remote controller, a mobile crane controller, a load sensor, a lifting frequency converter, a trolley frequency converter, and a large vehicle frequency converter. For non-specific voice control commands, the intelligent voice remote control device for mobile cranes can recognize "forward", "backward", "left", "right", "raise hook", "lower". "Hook", "Stop", "First Speed", "Second Speed" and "Three Speed" 10 non-specific voices, and convert these 10 voices into corresponding digital control instructions and transmit them to the crane controller for corresponding The mobile crane control realizes the voice wireless remote control of the mobile crane; the intelligent voice remote control device of the mobile crane also provides corresponding 10 button controls to realize wireless remote control of the mobile crane; the intelligent voice remote control device of the mobile crane realizes voice and button Combined wireless remote control and frequency conversion speed regulation.

The invention relates to the field of switching converters, and its purpose is to provide an efficiency that can take into account both light load and heavy load, and can reduce the duty cycle under light load, reduce the peak current of the primary side, reduce the cycle energy, and realize frequency conversion control , effectively reduce no-load power consumption and light-load loss; under heavy load, it can realize complementarity, transfer a part of energy through the DC blocking capacitor to the greatest extent, reduce the energy stored in the transformer, and enable the two switch tubes to achieve zero-voltage turn-on, improving the conversion A control method for the efficiency of an asymmetrical half-bridge flyback converter.

The invention relates to the field of energy-saving control of a central air-conditioning system, in particular to an energy-saving control cabinet of an air conditioning unit. The energy-saving control cabinet comprises a cabinet body and a cabinet door. A three-phase circuit breaker, three current transformers, a power frequency bypass contactor, a variable frequency switching contactor, a motor overload protector, a frequency converter, an intermediate relay and a single-phase miniature circuit breaker I are arranged on a lower mounting plate in the cabinet body. A single-phase miniature circuit breaker II, a direct-current switch power supply and an intelligent data processing unit are arranged on an upper mounting plate in the cabinet body. An intelligent operation touch screen is disposed on an upper cabinet door plate of the cabinet door. An alternating-current ammeter, an electricity meter, an alternating-current voltmeter, a signal indicating lamp, a manual frequency adjusting knob, a frequency operator operation panel, a start-stop button, a manual / automatic selection change-over switch, a three-phase main circuit breaker operating handle and a power frequency / variable frequency selection switch are disposed on a lower cabinet door plate of the cabinet door. By the energy-saving control cabinet, water valves and fans of the air conditioning unit can be intelligently controlled according to load changes, simplicity in mounting and debugging is realized, and energy-saving control on the air conditioning unit is realized.

The invention discloses a variable frequency magnetic variation speed device with a three-phase motor. The variable frequency magnetic variation speed device comprises the three-phase motor, a steering pump and a magnetic variable speed device, wherein the three-phase motor is connected with the power input end of the magnetic variable speed device; the powder output end of the magnetic variable speed device is connected with the driving shaft of the steering pump; and the output shaft of the three-phase motor and the driving shaft of the steering pump are positioned on a same axis. Furthermore, the variable frequency magnetic variation speed device also comprises a frequency converter which is connected with the power input end of the three-phase motor. The innovative design of the technical scheme is as follows: the three-phase motor, the magnetic variable speed device and the steering pump are integrally designed, and the variable frequency control over the motor is realized by virtue of the frequency converter, further the control over the steering pump lift is realized, and the variable frequency magnetic variation speed device can be applicable to various working places.