4 results about "Ac current" patented technology

A heat generating roller, fixing equipment and an image forming apparatus in which warm-up time is shortened while preventing excessive temperature rise and good fixing performance is realized by preventing occurrence of offset. In the heat generating roller, fixing equipment and image forming apparatus, the heat generating roller is formed principally by laying a high permeability conductive layer and a nonmagnetic conductive layer in layer. When a voltage is applied from a power supply (not shown) to an exciting coil and an AC current flow through it, magnetic flux is generated around the exciting coil and a magnetic field is formed. Since the heat generating roller has the high permeability conductive layer and the nonmagnetic conductive layer laid in layer, magnetic coupling of a system consisting of the heat generating roller and the exciting coil is good at the time of low temperature and heat generation of the heat generating roller is accelerated. When the Curie point is exceeded, skin depth becomes deep and skin resistance decreases, which suppresses generation of Joule's heat and reduces heat generation of the heat generating roller.

The invention discloses an inverter device. A control system is used for controlling a DC side soft starting contactor, a DC/AC module and an output module to enable the inverter device to be capable of converting the DC current outputted by an energy storage system to the AC current and then outputting the AC current, or converting the AC current received from the outside to the DC current and then outputting the DC current to the energy storage system; consequently, charging or discharging to the outside can be achieved through a power supply vehicle. Compared with the power supply vehicle utilizing diesel oil to generate electricity in the prior art, the power supply vehicle has the advantages that the diesel oil does not need to be purchased, so the cost is low; meanwhile, an electric generator is not needed, so noise is low and the environmental protection performance is good.

The invention relates to a motor vehicle, comprising an electrical machine (1) for driving the motor vehicle (25) and a power converter device (9) for providing an alternating current for the electrical machine (1), the power converter device having a cooling device (10), the cooling device (10) having at least one cooling liquid connection point (11), which is connected to a cooling liquid interface (6) of the electrical machine (1) in a liquid-conducting manner in order to form a common cooling circuit.