In an electric system for an electric vehicle, DC power of a main battery is converted into AC power by an inverter which has a power regenerative function. At startup, the system charges an input smoothing capacitor on the DC side of the inverter through an initial charging circuit with an initial charging switch and resistor. A main circuit switch that can stop current is connected between the main battery and the inverter. A rheostatic braking circuit with a rheostatic braking switch and a br...

An electric system for an electric vehicle enabling a secondary battery to be charged easily without using a large capacity and bulky charging system. The system can maintain integrity of power on a distribution network during charging. When charging the secondary battery, a switch connecting an inverter to an AC motor is opened, and then, the AC voltage from an external distribution network is supplied to the AC side of the inverter. The inverter rectifies the AC voltage to a DC voltage under t...

An electric system of an electric vehicle, in which an AC voltage is applied from an external AC power source to the inverter via windings of an AC motor during the charging operation of a main secondary battery. The inverter has a regenerative function enabling reverse conversion, and the motor windings operate as reactors. A contactor whose first terminals are connected to terminals of the windings and whose second terminals are shortcircuited is provided. The first terminals of the contactor ...

An electric system for an electric vehicle includes a main battery used for driving the vehicle, an auxiliary battery used for accessories of the vehicle, an AC motor for driving one or more wheels, an inverter for converting DC power supplied from the main battery to AC power to be supplied to the AC motor, and an auxiliary battery charging circuit for charging the auxiliary battery by using the AC power from the inverter. When charging the auxiliary battery, the AC power is insulatedly transfo...

An electric system of an electric vehicle including a main battery as a power supply, and a semiconductor power converter for driving a wheel driving motor. Impact destroying switches are inserted into connecting lines which connect a main battery to the semiconductor power converter, and into a connecting line connecting main battery block. Each impact destroying switch breaks its conduction by blasting an explosive in the switch in response to the impact due to a collision of the vehicle body....

It is an object of the present invention to provide an electric motor for an electric vehicle with an improved cooling capacity by causing coils wound around a stator to serve as a tubular heat pipe type heat transfer device. An electric motor for an electric vehicle includes a stator 11, coils 12 wound around at least the stator, and a rotor 13 being rotated by an induction field developed around the coils 12. In one embodiment of the invention the coils 12 are formed of a tubular container 121...

An electric coupler includes a socket device for coupling to an electric power source and having a pair of channels formed in a base and having a pair of passages, and a pair of conductors engaged in the channels of the base. A plug device includes a seat having a pair of conduits for receiving two prongs, and a pair of ears detachably engaged into the passages of the socket device for detachably securing the plug device to the socket device. The prongs may be shielded by the plug device and may...

An object of the present invention is to provide an electric microscope in which a liquid can be easily filled and removed when an immersion objective lens is inserted or removed into or from an optical path of the microscope. According to the present invention, there is provided an electric microscope comprising an electric revolver with a plurality of objective lenses mounted thereon, either one of which objective lenses disposed on an optical path, a revolver position detecting device for det...

The object of the invention is an electric guitar or electric bass, which includes a body, a neck, strings attached to the neck and to the body, an attaching mechanism and locking tuners of the strings and at least one pickup placed near the strings. According to the invention the body comprises of at least two separate parts attached within distance from one another. Furthermore the body comprises of attaching parts to attach the parts together.

An electric system for an electric vehicle includes a voltage type inverter that receives dc input voltage from a dc input circuit, and generates variable ac voltage of a variable frequency, and an ac motor including a plurality of windings each of which has one end connected to an ac output terminal of the voltage type inverter, the other ends of the windings being connected together to provide a neutral point of motor windings. A variable-voltage energy storage element is connected between the...