Abstract: A charging device for charging an electric vehicle includes a power plug, a charging gun, a control box, a temperature detecting circuit and an over-temperature protection circuit. The charging gun is detachably connected with the electric vehicle and includes a connection confirmation terminal and a connection confirmation circuit. The connection confirmation circuit outputs a connection confirmation signal to the connection confirmation terminal. The temperature detecting circuit detects the temperature of the power plug or the control box and outputs a temperature signal to a second control unit of the control box when the temperature of the power plug or the control box exceeds a threshold temperature level. The over-temperature protection circuit is electrically connected between the second control unit and the connection confirmation terminal.

Abstract: A charging device for charging an electric vehicle includes a power plug, a charging gun, a control box, a temperature detecting circuit and an over-temperature protection circuit. The charging gun is detachably connected with the electric vehicle and includes a connection confirmation terminal and a connection confirmation circuit. The connection confirmation circuit outputs a connection confirmation signal to the connection confirmation terminal. The temperature detecting circuit detects the temperature of the power plug or the control box and outputs a temperature signal to a second control unit of the control box when the temperature of the power plug or the control box exceeds a threshold temperature level. The over-temperature protection circuit is electrically connected between the second control unit and the connection confirmation terminal.

Abstract: A charging circuit interrupting device for applying an input voltage provided by first and second input power lines of a power system to first and second output power lines of an output system includes a current-detecting unit, a self-test device, and a controller. The current-detecting unit executes a leakage-detection function and generates a leakage signal when the current difference between the first and second power lines is detected. The self-test device generates a bypass path according to the detection enable signal so that there is a current difference between the first and the second input power lines. When operating in a self-test mode, the controller generates the detection enable signal, determines that the leakage-detecting function is normal, and enters a normal mode to apply the input voltage to the output system when the leakage signal is received.

Abstract: A power plug apparatus (10) includes a plug (102), a first temperature sensor (104) and a micro-control unit (108). The first temperature sensor (104) senses a temperature of the plug (102) and informs the micro-control unit (108) of the temperature of the plug (102). The micro-control unit (108) sends a control signal (112) to a load apparatus (30). According to the control signal (112), the load apparatus (30) receives a charging current (114).

Abstract: A ground detecting apparatus at least includes a metal oxide semiconductor field effect transistor and a high voltage resistor. The metal oxide semiconductor field effect transistor is used to replace a photo-coupler for switching. The high voltage resistor is used for safety isolation. A relay action detecting apparatus at least includes a metal oxide semiconductor field effect transistor and a high voltage resistor. The metal oxide semiconductor field effect transistor is used to replace a photo-coupler for switching. The high voltage resistor is used for safety isolation.

Abstract: A ground-resistance detection device, which is coupled to a power system including a first power line, a second power line, and a protective earth, includes a ground-resistance detection circuit and a controller. The ground-resistance detection circuit includes a first input node and a second input node. The first input node is coupled to either the first power line or the second power line. The second input node is coupled to a ground terminal. The ground-resistance detection circuit generates a DC output voltage according to the voltage of the first input node, the voltage of the second input node, and the DC reference voltage. The controller determines the ground resistance between the protective earth and the ground terminal according to the DC reference voltage and the DC output voltage.

Abstract: A charging circuit interrupting device for applying an input voltage provided by first and second input power lines of a power system to first and second output power lines of an output system includes a current-detecting unit, a self-test device, and a controller. The current-detecting unit executes a leakage-detection function and generates a leakage signal when the current difference between the first and second power lines is detected. The self-test device generates a bypass path according to the detection enable signal so that there is a current difference between the first and the second input power lines. When operating in a self-test mode, the controller generates the detection enable signal, determines that the leakage-detecting function is normal, and enters a normal mode to apply the input voltage to the output system when the leakage signal is received.

Abstract: A ground-resistance detection device, which is coupled to a power system including a first power line, a second power line, and a protective earth, includes a ground-resistance detection circuit and a controller. The ground-resistance detection circuit includes a first input node and a second input node. The first input node is coupled to either the first power line or the second power line. The second input node is coupled to a ground terminal. The ground-resistance detection circuit generates a DC output voltage according to the voltage of the first input node, the voltage of the second input node, and the DC reference voltage. The controller determines the ground resistance between the protective earth and the ground terminal according to the DC reference voltage and the DC output voltage.

Abstract: A ground detecting apparatus at least includes a metal oxide semiconductor field effect transistor and a high voltage resistor. The metal oxide semiconductor field effect transistor is used to replace a photo-coupler for switching. The high voltage resistor is used for safety isolation. A relay action detecting apparatus at least includes a metal oxide semiconductor field effect transistor and a high voltage resistor. The metal oxide semiconductor field effect transistor is used to replace a photo-coupler for switching. The high voltage resistor is used for safety isolation.

Abstract: A power system with a power apparatus for an X-ray tube is disclosed. The power system includes an X-ray tube and a power apparatus for the X-ray tube. The X-ray tube has a cathode and an anode. The power apparatus includes a first power conversion unit, a second power conversion unit, and a power switch unit. The first power conversion unit produces a positive voltage and a driving voltage and the second conversion unit produces a negative. When the power switch unit is turned off by the driving voltage, the power apparatus outputs the negative voltage to suppress electron flow energy generated from the cathode of the X-ray tube, whereas the power apparatus outputs the positive voltage to provide electron flow energy to the anode of the X-ray tube when the power switch unit is turned on by the driving voltage, thus producing X-ray.

Abstract: A method of controlling a power system of an X-ray tube is provided to supply power to the X-ray tube and control the emission operation of the X-ray tube. The method includes following steps: First, it is to judge whether a high voltage operation of the X-ray tube is started up. Afterward, a high voltage reference signal is gradually increased when the high voltage operation of the X-ray tube is started up. Afterward, it is to judge whether the high voltage reference signal is increased to an upper limit voltage level. Finally, the emission operation of the X-ray tube is executed when the high voltage reference signal is increased to the upper limit voltage level.

Abstract: A power system with a power apparatus for an X-ray tube is disclosed. The power system includes an X-ray tube and a power apparatus for the X-ray tube. The X-ray tube has a cathode and an anode. The power apparatus includes a first power conversion unit, a second power conversion unit, and a power switch unit. The first power conversion unit produces a positive voltage and a driving voltage and the second conversion unit produces a negative. When the power switch unit is turned off by the driving voltage, the power apparatus outputs the negative voltage to suppress electron flow energy generated from the cathode of the X-ray tube, whereas the power apparatus outputs the positive voltage to provide electron flow energy to the anode of the X-ray tube when the power switch unit is turned on by the driving voltage, thus producing X-ray.

Abstract: A heating device includes a first induction coil, a second induction coil, a first phase power unit, a second phase power unit, a power controller and a user interface unit. The second induction coil isn't always concentric with the first induction coil. The first phase power unit is connected with the first induction coil, and configured for receiving a first phase input voltage and outputting a first voltage. The second phase power unit is connected with the second induction coil, and configured for receiving a second phase input voltage and outputting a second voltage. There is a phase difference between the first phase input voltage and the second phase input voltage. The power controller is used for controlling operations of the first phase power unit and the second phase power unit. The user interface unit is connected with the power controller for controlling the power controller.