Research On Converting Technique In Power Accumulator Battery Testing System

Converter is the important part of the power accumulator battery testing system. The power accumulator battery test is strict with the ripple and transfer speed of test current. The power accumulator battery has tiny inner resistance and opposite voltage, so little voltage ripple from the converter can cause large current ripples. It restricted the application of phase-controlled converter and PWM converter. This paper analyzed converters in the power accumulator battery testing system theoretically and performed tests for its applications to solve the power accumulator battery testing system's special need to the converters.1 This paper put forward a loop-locked control method based on dq coordinate conversion to SVPWM converters in the power accumulator battery testing system. It increases the transform efficiency by SVPWM and get high power factor and high dynamic response quality by dq coordinate conversion.2 This paper put forward a design method of reversible low ripple fast response filter. Infix decay method is applied to the power accumulator battery testing system's DC filter design and the single-end load network is utilized to calculate the filter's parameter. The lossy filter's dissipation factor can make its transfer-function's normalized pole and zero shift left. This paper put forward a method which made the decay pole near the harmonics frequency to achieve reasonable filtering result by adopting appropriate partial component dissipation. A way to determine the order of Chebyshev DC filter is presented. Simulations and tests proved that the filter possesses merits of low resonance value, fast converse ability and excellent filtering result.3 This paper put forward a topology based on current mode PWM converter which is applied in the power accumulator battery testing system. It realized the demand of wide adjustable output range, reversible power transformation and ability of output high voltage and large current.4 This paper finished the phase-controled and the CSC converters in power accumulator battery by MATLAB. Simulations prove the accuracy and validity of the loop-locked control method based on dq coordinate conversion, the design method of low ripple fast response bi-directional filter and the topology of the power accumulator battery testing system converter.5 This paper finished the PWM converter modle machine based on dq coordinate conversion and proved the accuracy and validity of the proposed methods by tests.