Development of a Long Life Uninterruptible Power Supply Using a Flywheel Energy Storage Unit.

研制了一种由飞轮和电机/发电机组成的储能装置不间断电源。主要结果如下：1.10KW-1min。飞轮是为了试验而设计和建造的，但还没有经过真空系统事故的检验。2.为了改进真空系统，用性能良好的锆吸气剂取代了钛吸气剂。从长期的实验来看，真空不是通过O形环和CASG容器的泄漏来保持的。3.采用开关损耗恢复电路和非晶铁心电抗器，获得了93%的高效率。4.应用无电容逆变器理论，用小的MUF薄膜电容器取代了寿命短的电解电容器。在具有升压能力的10KW系统中，电容的最小值可降至200muF。5.采用PWM逆变器的高响应电流控制，可获得99%的输入功率因数和2%的输出电压失真。7.通过更换脉冲变压器和晶体管放电电路，消除了栅极隔离的短寿命光电耦合器。通过对电机/发电机电源的直接转矩控制，实现了飞轮的无位置传感器驱动。它制作了一个简单的真空室和高速的功率再生。以上实验数据验证了飞轮在不间断电源储能单元中应用的有效性。

An uninterruptible power supply composed of a flywheel and a motor/generator for energy storage unit is developed. The main results obtained are as follows;1.The 10KW-1min. flywheel was designed and constructed for trial, but not yet examined by vacuum system accidents.2.For vacuum system improvements, the titanium getter was replaced by the good performance zirconium getter. From long term experiments, the vacuum was not maintained by leak through O-rings and the castg vessel.3.High efficiency of 93% was achieved by using switching loss recover circuits and amorphous core reactors.4.Short life electrolytic capacitors were replaced by small muF film capacitors by applying capacitor less inverter theories. The minimum value of capacitance can be decreased to 200muF in 10KW system having voltage build-up ability.5.By using high response current control of the PWM inverter, 99% input power factor and 2% output voltage distortion were obtained, simultaneously.7.Short life photo-couplers of the gate isolation were also removed by replacing pulse-transformers and transistor discharge circuits. As a result, the system will have over 15 years life.8.By use of direct torque control for motor/generator power, the sensorless drive of the flywheel was realized. It made a simple vacuum vessel and high speed power regeneration. All experimental data shown above present the validity of the flywheel use for energy storage units of uniterruptible power supplies.