30 results about "Digital test controller" patented technology

A hybrid control system for controlling an electric machine coupled to a gas turbine engine is provided. The control system comprises: a primary analog control loop including an analog controller for controlling the electric machine based on a set point and a measured output of the electric machine; and a digital controller of the turbine engine operationally connected to the primary analog control loop to adjust at least one control parameter associated with the analog controller.

Welding systems are presented, in which a single power source provides a first DC output to a plurality of digital waveform controlled chopper modules. Welding modules are also disclosed for converting an input DC signal to a welding signal, which are comprised of a down-chopper for providing a welding signal waveform according to a pulse width modulated switching signal, along with a digital waveform controller providing the switching signal according to a desired waveform.

An apparatus and method for controlling a test controller is disclosed. An apparatus includes test controllers of a first type configured to operate according to a first protocol and test controllers of a second type configured to operate according to a second protocol. A test controller of the second type may be associated with one of the test controllers of the first type, with the former controlling the latter. The test controllers of the second type may each control associated ones of the test controllers of the second type in parallel and independently of one another.

The invention belongs to the technology of plane environment control, and relates to the improvement of a method for determining a control parameter of a digital controller of a cabin pressure control system. The method for determining the control parameter of the digital controller of the cabin pressure control system is characterized by including the following steps that a testing device is connected, a quick change area of an exhaust valve under a typical airport environment is determined, the minimum value in the H1 and H2 is selected, and the parameter and the parameter action range of the digital controller are determined. By means of the method for determining the control parameter of the digital controller of the cabin pressure control system, the phenomenon of 'swelling' in the rapid climbing process of a plane is removed, and the comfort of flight personnel and passengers is improved.

The invention discloses a digital vortex multi-connected air conditioner refrigerating system teaching training station, which consist of a digital vortex multi-connected air conditioning unit and a refrigerating system operation and control training station. The digital vortex multi-connected air conditioning unit comprises a refrigerating system and an electric control system. The refrigeratingsystem consists of a digital vortex compressor, a fixed frequency compressor, a main four-way valve, an auxiliary four-way valve, various control electromagnetic valves, a condenser, a throttling part and a multi-connected indoor unit. The electric control system comprises a sensor, a main control board, a digital vortex controller and a plurality of electric appliance actuating mechanisms. The front side of the refrigerating system operation and control training station is printed with a refrigerating system pipeline structure schematic diagram and is provided with a thermal parameter instrument and an electric quantity parameter instrument which are used for displaying real-time parameter values. By two modes of simulation and real operation, design functions of comprehensive learning training, experiments and the like such as operation mechanism learning, signal measurement, fault setting and diagnosis, signal acquisition and real-time demonstration, performance tracking research and the like are realized.

An electromagnet power source comprises a digital controller, a modulator, a power device and an electric current transducer, wherein based on a preset referential current signal and a sensing current signal of output electric current corresponding to the electromagnet power source, the digital controller produces a controlling current signal, based on the controlling current signal, the modulator produces a power device controlling signal, based on the power device controlling signal, the power device draws electric energy from a power supply and provides an electromagnet load for the electric current, and the electric current transducer is arranged at the output end of the electromagnet power source to produces the sensing current signal. The electromagnet power source and control method and digital controller of the electromagnet power source provides a method used for controlling the electromagnet power source and the digital controller.

The invention discloses a soft starting method of power output of a micro gas turbine power station. The method comprises the steps as follows: (1) for a load of which the load type is a motor type and parameters are known, a user inputs load parameters into an upper computer, the upper computer calculates soft starting parameters, transmits the soft starting parameters to a digital power controller in the micro gas turbine power station and executes the step (2), the load parameters include rated voltage Vm, a rated frequency fm, rated power Pm and rated current Im of the load, and the soft starting parameters include an output voltage initial value V0, an output frequency initial value f0, an output voltage change rate Vslew and an output frequency change rate fslew; and (2) the digital power controller receives the soft starting parameters and drives the load to start according to the soft starting parameters. According to the soft starting method, the loading ability of the micro gas turbine power station can be improved on the basis of meeting an existing power output function, and especially, the soft starting method has a significant effect on the load of an asynchronous motor.

The invention discloses an output constant current-based digital controller of an AC-DC (alternating current-direct current) isolated converter. The digital controller comprises a voltage detecting unit, a current threshold calculating unit, a delay compensation calculating unit, a peak current comparing unit, a PWM (Pulse-Width Modulation) generating unit and a driving unit. In the digital controller, according to the inherent characteristic of a Flyback isolated topology structure and on the basis of the traditional AC-DC isolated converter, the original side peak current is sampled, and the auxiliary winding voltage is sampled, so that a coupling isolating device is eliminated, and the cost is reduced; the rising digital control technology is adopted to substitute the traditional analog control technology, constant current control is ingeniously realized through the special powerful operational capability of digital control, and the large area occupied by analog control is reduced; and in order to overcome the deficiency of control precision in the digital control way, a switch tube driving circuit delay compensation unit is introduced to improve output current precision.

The invention relates to a non-uniform oversampling digital controller and a control method thereof, and belongs to the technical field of electronic circuits. The non-uniform oversampling digital controller comprises a proportion-integration-differential compensator and a non-uniform oversampling ADC changing resolution and conducting sampling and quantization based on input signal. The non-uniform oversampling ADC is provided with a first input end used for output connection with switching converter topology and a second input used for connection with reference signals. The output end of thenon-uniform oversampling ADC is connected with the input end of the proportion-integration-differential compensator. The proportion-integration-differential compensator is provided with an output end. The invention further discloses the control method of the non-uniform oversampling digital controller. The non-uniform oversampling digital controller and control method thereof have the advantagesthat the structure is simple, the switching time is short, accuracy is high, and stability is high.

A power conversion apparatus, including a transformer, a switch, an analog controller, a digital controller, and a voltage converter-based feedback circuit, is provided. The primary side of the transformer is coupled to an input voltage, and the secondary side of the transformer is coupled to an output voltage provided to a load. The switch intermittently transmits the input voltage to the primary side of the transformer. The analog controller is disposed at one of the primary side and the secondary side of the transformer and configured to control the operation of the switch in response to an analog feedback signal. The digital controller is disposed at the other one of the primary side and the secondary side and configured to generate a digital feedback signal. The voltage converter-based feedback circuit is configured to convert the digital feedback signal to the analog feedback signal based on a voltage conversion characteristic thereof.