45 results about "Air conditioner inverter" patented technology

The invention relates to an electric current reconstructing and over-modulating device of an air conditioning frequency converter, which is characterized by comprising an electric current reconstructing device, a vector controller, a pulse width modulation (PWM) frequency converter, a direct current side electric current sensor, an electric motor and a coder. The electric current reconstructing device comprises an SVPWM over-modulating module, a pulse width modulation (PWM) signal adjusting module, a direct current sampling module and an alternating current reconstructing module. An electric current reconstructing and over modulating method of the air conditioning frequency converter comprises the steps: sampling the direct current side electric current of the pulse width modulation (PWM)frequency converter at twice by the electric current reconstructing device; counting an approach vector switch action time which meets a minimum sampling time request according to the two sampling values; sampling the direct current side electric current at twice again in the approach vector switch action time; and reconstructing three phase alternating current according to the sampling values ofthe direct current at twice, thereby realizing the closed loop control of the pulse width modulation (PWM) frequency converter. The modulating method can be widely used for the field in reconstructingand over-modulating the electric current of the frequency converter in air conditionings and electric vehicles.

The invention relates to an air conditioner and an air conditioner frequency converter cooling method. The air conditioner comprises a radiator, a refrigerant pipeline and a throttling device, wherein the radiator is used for dissipating heat of a power component of the air conditioner; the refrigerant pipeline is located between an outdoor unit heat exchanger and an indoor unit heat exchanger and passes through the radiator; the throttling device is located on the refrigerant pipeline and used for controlling a refrigerant in the refrigerant pipeline to enable the refrigerant to pass through the radiator in the state of two-phase flow. The air conditioner can prevent the radiator located at an outdoor unit of the air conditioner from condensing or frosting.

The present invention provides a motor drive system for a hybrid vehicle and a method for controlling the same, which can prevent a counter electromotive force generated from a motor during turn-off of a main relay from being applied to non-powertrain components such as a DC converter and an electric air conditioner inverter, thus protecting the non-powertrain components and preventing the occurrence of failure.

The invention discloses a motor-driven air conditioning system for an automobile, which comprises an air conditioning unit (1), an air conditioning frequency converter (2), a high voltage generator (3), a generator controller (4) and a power accumulator (5). The air conditioning unit (1) is an integrated air conditioning unit arranged at the top of the automobile, the high voltage generator (3) is driven by a crank shaft (6) of an automobile engine through a belt, the generator controller (4) is respectively connected with the high voltage generator (3), the air conditioning frequency converter (2) and the power accumulator (5), and the power accumulator (5) is connected with the air conditioning frequency converter (2). The motor-driven air conditioning system for the automobile can save oil by more than 18% if used for fuel automobiles.

The embodiment of the invention provides a cooler used for an air conditioner frequency converter and a variable frequency air conditioner, and relates to the technical field of heat exchange devices. The cooler and the variable frequency air conditioner are invented for solving the problem that an existing cooler is low in cooling efficiency. The cooler used for the air conditioner frequency converter is used for cooling the air conditioner frequency converter and comprises a base and a cooling part. The base is made from a heat conduction material. The cooling part and the base are connected in a heat transfer manner. The cooling part comprises a microchannel flat pipe. The microchannel flat pipe comprises at least two straight pipe sections parallel to one another, and elbow sections used for connecting the adjacent straight pipe sections. Fins are arranged between every two adjacent straight pipe sections. The two ends of the microchannel flat pipe are each connected with a collecting pipe. A microchannel inside the microchannel flat pipe communicates with the collecting pipes. The cooler used for air conditioner frequency converter and the variable frequency air conditioner are used for regulating the indoor temperature.

The invention belongs to the technical field of air conditioners, particularly relates to a method and device for configuring parameters of a frequency converter of an air conditioner and aims at solving the problem that a frequency conversion compressor cannot work in a stable state due to the fact that obtained local characteristic parameters of a compressor motor are directly applied to vectorcontrol of a frequency conversion controller in the prior art. The method for configuring the parameters of the frequency converter of the air conditioner comprises the steps of identifying local characteristic parameters of the compressor of a frequency conversion air conditioner according to electric parameters of the frequency conversion air conditioner; matching the local characteristic parameters with prestored motor parameters of multiple types of compressors to obtain the type of the compressor of the frequency conversion air conditioner; and obtaining motor parameters and control parameters of the compressor of the frequency conversion air conditioner for control of the frequency conversion controller of the frequency conversion air conditioner on the compressor of the frequency conversion air conditioner on the basis of the type of the compressor of the frequency conversion air conditioner. According to the method provided by the invention, a potential quality hazard caused byan artificial setting error can be avoided and complete and accurate motor parameters and control parameters of the compressor can be applied to vector control.

The invention discloses an air-conditioning inverter topology for an electric power rail locomotive vehicle, which comprises a DC400-600V input power supply, the DC400-600V input power supply is connected with a parallel half-bridge inverter group, the parallel half-bridge inverter group comprises four half-bridge inverter circuits which are connected in parallel, each half-bridge inverter circuit is connected with an isolation transformer, and the isolation transformer is connected with the DC 400-600V input power supply. Each isolation transformer is connected with an uncontrolled rectification circuit, the four uncontrolled rectification circuits are connected in series to form a series uncontrolled rectification group, and the output positive electrode of the series uncontrolled rectification group is sequentially connected with one end of an inductor L1, one end of a capacitor C9 and the output negative electrode of the series uncontrolled rectification group. A three-phase full-bridge inverter circuit is connected in parallel between one end of the C9 capacitor and the other end of the C9 capacitor, and a single-phase full-bridge inverter circuit is also connected in parallel between one end of the C9 capacitor and the other end of the C9 capacitor. The invention further relates to a control method of the air conditioner inverter topology for the electric power rail locomotive vehicle. The problem that the air-conditioning efficiency is reduced due to fluctuation of the input voltage of an existing DC400V-DC600V air-conditioning inverter for the passenger train is solved.

The invention relates to an air conditioner inverter compressor frequency-domain constant torque control system and method. The air conditioner inverter compressor frequency-domain constant torque control system comprises a current vector control portion and a constant torque control portion; the constant torque control portion outputs a current command which is used for reducing current pulse and adds the current command which is used for reducing the current pulse and an input signal of the current vector control portion to serve as input of the current vector control portion; the current vector control portion outputs a voltage control command to control a compressor. The improved constant torque compensation control method can be applied to a full frequency domain of a compressor; the constant torque control portion compensates currents to an input end of the current vector control portion; during a high band operation process, the currents are stable, a wave crest value at every period is uniformly distributed, the compressor stably operates.

The invention provides a pure battery power ship powered system. Another technical scheme of the invention is to provide a control method of the system. The pure battery powered ship power system provided by the invention is configured with a plurality of groups of battery packs and high-voltage boxes, two sets of main propulsion inverters and motors, two sets of daily inverters, one set of side propulsion inverters and motors, one set of air conditioner inverters and motors, one solid-state circuit breaker, two shore power interface boxes and one set of comprehensive control system. The battery packs supply power to the main propulsion inverters and the motor by adopting a three-level framework, a three-phase direct-current solid-state circuit breaker is configured in the middle of a direct-current bus, the daily inverters adopt a grid-connected operation mode, a shore power direct-current charging system is adopted to directly charge the battery packs, and a comprehensive control system is configured. According to the pure battery powered ship power system, vibration and noise of the propulsion motor are reduced, the energy density of main equipment is improved, the cost and space arrangement of the system are reduced, and the safety and reliability of the system are improved.

The invention provides an integrated air conditioner frequency converter for an air conditioner of an electric passenger car, which comprises a charging part and a hollow reactor, wherein the hollow reactor is coupled between a power supply and the charging part. The invention simultaneously provides an air conditioning unit of the electric passenger car containing the air conditioner frequency converter. The integrated air conditioner frequency converter has the advantages of simple circuit and reliable work.

The invention belongs to the field of electromagnetic compatibility, relates to an anti-counterattack interference power supply filter for a direct-current system and aims to effectively suppresses reverse counterattack interference on a direct-current power supply bus by current surge generated in the operation of electrical equipment taking a high-power IGBT element as a core. The filter is mainly applied to a direct-current power supply system of a Dongfeng diesel locomotive, and is used for suppressing counterattack interference on a power supply bus caused by current surge generated during the operation of air conditioner frequency converter equipment connected with the power supply bus of the same direct-current system so as to improve the reliability and safety of other vehicle-mounted electrical equipment in the same direct-current system. The power supply filter provided by the invention comprises a set of full-balance structure pi-type low-frequency filter circuit module mainly used for suppressing electromagnetic interference of low-frequency components, a set of high-frequency filter circuit module which is composed of a full-balance four-order Butterworth low-pass filter circuit and is mainly used for suppressing the electromagnetic interference of medium-high frequency components, and a set of RDC damping absorption circuit module which is designed in a redundantmode and aims at suppressing high-amplitude direct current surge. According to the low-frequency filter circuit module and the high-frequency filter circuit module provided by the invention, the full-balance circuit structure form is adopted, so that surge of counterattack interference can be suppressed when fleeing into a bus from a positive electrode end or a negative electrode end.

The invention discloses an urban rail vehicle air-conditioner inverter power supply, which comprises a high-voltage DC power supply and a low-voltage DC power supply, and is characterized in that the high-voltage DC power supply is connected to a three-phase inversion module through a buck chopping module and an isolation module; the three-phase inversion module is connected to a load; and the low-voltage DC power supply is connected to the three-phase inversion module through a boost module. According to the invention, the high-voltage DC power supply and the low-voltage DC power supply of an urban rail vehicle are enabled to act as an air-conditioner inverter power supply after being inverted, the load of an auxiliary power supply and the added weight of the vehicle are effectively reduced, the low-voltage DC power supply provides an inverter power supply for a blower when the high-voltage DC power supply is subjected to loss of power, and the reliability and the utilization efficiency of the circuit are improved while the energy is saved.

The invention discloses an air conditioner and an integrated air conditioner controller. The controller comprises a base plate, a rectifier bridge, a power factor correction PFC drive circuit, a compressor drive circuit and a compressor control chip. At least one part of devices in the PFC drive circuit and the compressor drive circuit are SiC devices, and the other part of devices are Si devices.A voltage converter is further included and used for generating the conversion voltage according to the power source voltage, when the power source voltage is the first voltage, the voltage convertergenerates the second voltage, when the power source voltage is the second voltage, the voltage converter generates the first voltage, the first voltage is used for supplying power to the Si devices,and the second voltage is used for supplying power to SiC or GaN devices. Accordingly, the manner that the SiC devices replace part of the Si devices is adopted, the voltage converter is arranged so that the drive circuits can be compatible with different switching devices, and performance and reliability of the controller are improved.

The invention discloses a controller for a variable frequency air conditioner participating in frequency modulation of a power system by considering frequency modulation excitation signals. A comfortlevel setting module outputs set comfort level data to a historical data storage module and a central processing module; an excitation signal receiving module outputs an excitation signal to the historical data storage module and the central processing module; a frequency measurement module of a frequency converter outputs data to the historical data storage module and the central processing module; the historical data storage module outputs the historical data to a display screen module; the display screen module displays the data; the central processing module processes the set comfort leveldata, the frequency modulation excitation signal data and the real-time frequency data of the frequency converter to obtain a control signal, and transmits the control signal to the frequency converter of the air conditioner. The controller for the variable frequency air conditioner participating in frequency modulation of the power system by considering frequency modulation excitation signals can receive frequency modulation excitation signals sent by a power grid company, enables the variable frequency air conditioner to participate in frequency modulation response of a power system, reduces the pressure of frequency modulation at the power generation side, reduces resource waste caused by frequency modulation of a frequency modulation unit, and achieves the purposes of energy conservation and emission reduction.

The invention relates to a detection method and equipment for preventing reverse installation of an air conditioner frequency converter and an air conditioner. The method comprises the steps that the exhaust temperature and the outdoor environment temperature are subtracted to obtain a first difference value; and whether the frequency converter is reversely installed is judged according to a comparison result of the first difference value and a temperature threshold value. According to the scheme, the air conditioner can complete frequency converter fault self-detection and fault handling, even if a user cannot replace the frequency converter in time, normal operation of the air conditioner can be guaranteed through data correction in the air conditioner, the time and energy of the user are saved, and meanwhile, the requirement of the user for using the air conditioner is guaranteed preferentially.

The invention discloses an inverter air conditioner. The inverter air conditioner includes a compressor, an indoor heat exchanger and an outdoor heat exchanger. The compressor has an exhaust port and an air suction port. The compressor includes a compression mechanism part and a motor part. The part includes two cylinders and a crankshaft, each cylinder is provided with a reciprocating slide, the crankshaft is provided with an eccentric part located in the two cylinders, the motor part is a three-phase permanent magnet motor, and the line-to-line induction of the three-phase permanent magnet motor The voltage constant does not exceed 45Vrms/Krpm, the mechanical frequency of the compressor is not lower than 100Hz under rated voltage and standard working conditions, one of the indoor heat exchanger and the outdoor heat exchanger is connected to the exhaust port, and the indoor heat exchange The other of the heat exchanger and the outdoor heat exchanger is connected to the suction port. According to the frequency conversion air conditioner of the present invention, while ensuring the temperature variable performance of the frequency conversion air conditioner, the weight of the frequency conversion air conditioner can be reduced, and the operation reliability is high.