Energy-recovering direct-current electric actuator
The present invention pertains to the field of transportation and relates to electric actuators for vehicles which are supplied from a DC circuit. This invention may be used for electric actuators in electrical load-lifting devices such as lifts or lifting cranes. The electric actuator of the present invention includes a DC propulsion motor (6) having a voltage regulator serially connected thereto. The voltage regulator is made in the shape of an electrical circuit that comprises two inverters (1, 5) connected to each other by the AC outputs and through a transformer (4) having an adjustable transformation ratio. The DC outputs of one inverter (1) are connected to the power supply circuit (2, 3), while that of the second inverter (5) are connected to the DC propulsion motor (6). The inverters are further designed for operation in a rectifying mode since rectifiers are included in their circuits. This invention provides an operation mode in which the current of the propulsion motor, during the energy recovering mode, is not transmitted by pulses but directly so as to improve the utility coefficient of the recovered energy transmission.
Publication number: WO9851552A2 | Search similar patents
System and method for reducing fuel consumption in a vehicle
A drive system includes an engine, an alternator coupled to the engine, the alternator being configured to power at least one auxiliary load, a traction motor system operatively coupled to drive wheels of the vehicle, the traction motor system being configured for receiving primary electrical power from the alternator and for propelling the vehicle in response to the primary electrical power, and a motor electrically connected to the traction motor system and mechanically coupled to the engine. The motor is configured to receive electrical power from the traction motor system in a dynamic braking mode of operation of the traction motor system and to communicate power to the engine during the dynamic braking mode.
Publication number: US2016101699A1 | Search similar patents
Vibrating loudspeaker as well as ringing and vibration device incorporating such a loudspeaker
The transducer has a cylindrical unit (3) comprising inductor windings (4, 5) which are distributed into two solenoid type circuits. The circuits are connected with each other and supplied in a distinct manner from respective terminals (14, 15). The circuits comprising permanent magnet (7) and is adapted for concentrating the magnetic flux in a region in which the windings are situated. An independent claim is also included for a mobile telephone comprising a ringing and vibration device including an electromechanical transducer.
Publication number: EP1681902A1 | Search similar patents
The drive has an electrical energy generator for feeding electrical energy into a ship network. An electrical propulsion drive is supplied with the electrical energy through the ship network and has a brake device. The brake device of the electrical propulsion drive is formed as an electrical brake resistor (1). The electrical brake resistor is laid such that it is installable at a board of a marine ship. The electrical brake resistor has a metallic housing (2) with a housing frame (3) and a wall plate (4) screwable with the housing frame.
Publication number: EP1902944A2 | Search similar patents
Regenerative braking system for reducing fuel consumption
Systems and methods are disclosed for reducing engine fuel consumption during regenerative braking. According to certain embodiments, the regenerative braking system has an engine, a generator, a rectifier, a first inverter, a traction motor, and a reverse recovery unit. The generator is configured to be driven by the engine to produce AC electrical power. The rectifier is configured to receive AC electrical power from the generator and convert the AC power to DC power. The first inverter is configured to receive the DC power and convert the DC power to AC power. The traction motor is configured to be driven by the AC power in a traction mode, and to produce regenerated power when rotated in reverse in a regenerative braking mode. The reverse recovery unit has a second inverter and a filter. The second inverter is electrically connected in parallel with the rectifier and configured to communicate at least part of the regenerated power from the traction motor to the generator during the regenerative braking mode. The filter is electrically connected downstream of the second inverter and in parallel with the rectifier. The filter is configured to filter transient voltage generated by the second inverter during the regenerative braking mode.
Publication number: US9481252B1 | Search similar patents
Energy storage system and method for hybrid propulsion
A hybrid propulsion system. The system comprises one or more hybrid propulsion traction drives having an electric motor operable to produce mechanical power for propulsion. A hybrid propulsion traction drive is operable to receive power from an on-board power generation system. The electric motor is operable to receive power from an energy storage unit and operable to supply power to the energy storage unit. The energy storage unit may be coupled to the electric motor via a switch.
Publication number: EP1763451A2 | Search similar patents
Method and device for managing the energy of a hybrid vehicle
The invention relates to a method for managing the energy of a hybrid vehicle comprising a heat engine (1), one or more electric traction motors (2), at least one high-voltage traction battery (4), a low-voltage on-board battery (6) for the vehicle accessories (8), a current inverter (3) capable of transforming the DC currents supplied by the traction battery (2) and by the on-board battery (6) into AC currents for the electric motor (2), and a current transformer (7) capable of converting the high-voltage current of the traction battery (4) into low-voltage current of the on-board battery (6), characterised in that the transformer (7) has reversible operation that makes it possible to use the stock of energy available in the low-voltage battery (6) such as not to draw energy from the high-voltage battery (4) when the latter has a relatively low state of charge (SOC).
Publication number: WO2015092173A2 | Search similar patents
System for balancing a traction battery of a vehicle
The present invention concerns a system (1) for balancing a traction battery (3) of a vehicle comprising: - the battery (3), including a plurality of modules (3A, 3B, 3C), each module (3A, 3B, 3C) comprising a plurality of accumulators (13); - a plurality of energy converters (5A, B, 5C), each energy converter (5A, 5B, 5C) being combined with a module (3A, 3B, 3C) and intended to be connected to an electrical system (9) of the vehicle, and each energy converter (5A, 5B, 5C) including a magnetic circuit (19) and a set of windings (S1) configured to transfer energy from a module (3A, 3B, 3C) to the electrical system (9). It is characterised in that each energy converter (5A, 5B, 5C) further comprises a set of additional windings (S2) configured to transfer energy from the electrical system (9) to an accumulator (13).
Publication number: WO2014080138A1 | Search similar patents
Method and system for eliminating fuel consumption during dynamic braking of electric drive machines
A drive system (100, 100a-c) for an electric drive machine (102, 102a-c) having an engine (104, 104a-c), a generator (106, 106a-c), a motor (108, 108a-c), final drive wheels (110, 110a-c) and auxiliary devices (116, 116a-c) is provided. The drive system (100, 100a-c) may include an inverter circuit (118, 118a-c) and an auxiliary driver (120, 120a-c). The inverter circuit (118, 118a-c) may be coupled to each of the generator (106, 106a-c) and the motor (108, 108a-c). The auxiliary driver (120, 120a-c) may be coupled to each of the generator (106, 106a-c) and the auxiliary devices (116, 116a-c). The inverter circuit (118, 118a-c) and the auxiliary driver (120, 120a-c) may be configured to automatically communicate power from the engine (104, 104a-c) and any power from the auxiliary devices (116, 116a-c) to the motor (108, 108a-c) in a propel mode, and automatically communicate power from the motor (108, 108a-c) to the engine (104, 104a-c), and optionally to a hybrid system (132) if applicable, in a dynamic braking mode so as to minimize fuel consumption during the dynamic braking mode.
Publication number: US2012043810A1 | Search similar patents