SK162019U1 - Connection of the traction transmission with the current cycloconverter and multiphase motors - Google Patents

Abstract

The connection of the traction transmission with the current cycloconverter and multiphase motors consists of an internal combustion engine (1), an electric generator (2), a smoothing filter (3), a current-powered cyclic converter (4), a left multiphase electromotor (5), a right multiphase electromotor (6), compensating converter (7), battery (8) and control system (9). The connection of the traction transmission with the current cycloconverter and multiphase motors belongs to the group of drives for hybrid electric vehicles and is characterized in that the motors are connected in series and powered from one current cycloconverter. The connection has two power sources. The main source is an electric generator powered by an internal combustion engine. The second source is a battery-compensated converter which also serves as an auxiliary source.

Description

Technical field

The subject of the technical solution is the connection of the traction transmission with the current cycloconverter and multiphase motors. The technical solution concerns the problems of hybrid electric vehicles (HEV), ie the field of automotive technology, electrical engineering and power electronics.

BACKGROUND OF THE INVENTION

The current trend is to reduce exhaust emissions, reduce fuel consumption, increase range. Hybrid propulsion systems or purely electric propulsion systems are becoming increasingly prominent.

Hybrid electric vehicles operate in principle with either serial or parallel transmission of traction power. In parallel HEV internal combustion engine and electric motor work simultaneously (parallel), the power is added in mechanical transmission of the driving axle. However, most HEVs use serial power transmission and a voltage converter system based on an inverter with a rectifier, DC between the circuit and voltage inverters with one central electric motor and a mechanical differential transmission. This electrical part of the transmission is powered by an internal combustion engine. electric motor for internal combustion engine. For HEVs with one traction motor, a mechanical differential must be used, while using an electronic differential (two traction motors used) two separate inverters must be used. However, these methods of implementation significantly reduce the efficiency of the system. In case of current converter applications, two independent current converters with independent control must be used to achieve different speeds, which increases dimensions, weight and cost.

The essence of the technical solution

The above-mentioned disadvantages are eliminated by the connection of the traction transmission with the current cyclo-converter and multiphase motors. The technical solution consists of three parts.

The first part consists of an internal combustion engine that powers the electric generator and thus creates an independent power supply network that supplies power to the rest of the hybrid electric vehicle. This power supply is connected in parallel with a compensation converter, which performs two functions.

If necessary, it supplies battery power to this network or accumulates it in the battery if there is an excess of power in this network. The main function of the compensation converter is to compensate for unwanted components in this supply network so that the generator is only stressed by the active power and thus works optimally.

The second part consists of a current-powered cyclo-converter, which generates the required voltages for the series-connected multi-phase electric motors - left and right. The traction motors used must be more than three-phase. Optimal parameters can be achieved by using 5-phase motors. The series connection of motors ensures that even at different motor speeds (eg when cornering) and therefore different slip and load, the voltages on the motors are correctly redistributed even without the need to interfere with the drive control. In the case of regeneration (vehicle braking, downhill driving), the CCD can supply the power from the traction motors back to the mains and then accumulate it in the battery via a compensating converter, or the internal combustion engine can be braked.

The last part consists of a control system whose task is to read the parameters of the electric generator, left and right multiphase electric motor, compensating converter and battery and to control the internal combustion engine, current-powered cyclo-converter, and compensating converter.

The connection of traction transmission with a current cyclo converter and multiphase motors brings many advantages, for example:

- implemented electronic differential - the absence of a mechanical differential increases the efficiency of mechanical energy transmission and reduces the possibility of mechanical failure,

- direct transmission of AC power without changing it to DC in the rectifier, which also increases the efficiency of the whole system,

- parallel operation of the generator and the battery allows the system to operate in various separate operating modes,

- series connection of multiphase motors - only one direct converter required.

With K16-2019 U1

BRIEF DESCRIPTION OF THE DRAWINGS

In FIG. 1 is a block diagram of a traction transmission circuit with a current cyclo-converter and multi-phase motors.

EXAMPLES

The connection of the traction transmission with the current cycloconverter and multiphase motors, according to FIG. 1 consists of an internal combustion engine 1 and an electric generator 2 which are resiliently connected via shafts. The electric generator 2 forms an independent supply network, from which the current-powered cyclo-converter 4 is fed directly through the smoothing filter 3. The compensating converter 7, whose operation mode depends on the current state of the whole system, is also connected to this network. The current-powered cyclo-converter 4 generates voltage for the series-connected left multiphase electric motor 5 and the right multiphase electric motor 6. Depending on the mode of operation, the compensation converter 7 is either powered by battery 8 or recharged by battery 8. The correct operation of the whole system is taken care of by the control circuit 9, which reads data from the electric generator 2, the left multiphase electric motor 5, the right multiphase electric motor 6, the compensating converter 7 and the battery 8 and controls the combustion engine 1, the current-powered 7th

Industrial 'usability

Connection of traction transmission with current cyclo-converter and multiphase motors can be used in all electric vehicles - HEV - (Elybrid Electric Vehicle), BEV - (Battery Electric Car), FCEIEV - (Fuel Cell Hybrid Electric Vehicle). This connection can also be used in diesel-electric locomotives, e-trucks, handling machines, etc.

S K16-2019 Ui

List of reference marks

- Combustion engine

- electric generator

3 - smoothing filter

-current-powered cyclo-converter

- left multi-phase electric motor

- right multi-phase electric motor

- compensating converter

8 - battery

-control system

Claims (3)

PROTECTION REQUIREMENTS 1. Connection of traction transmission with turbocharger and multiphase motors consisting of internal combustion engine (1), electric generator (2), smoothing filter (3), current-powered cycloconverter (4), left multiphase electric motor (5), right multiphase electric motor (6) ), compensating converter (7), battery (8) and control system (9), characterized in that the shaft of the internal combustion engine (1) is flexibly connected to the shaft of the electric generator (2), furthermore a smoothing filter (3) and compensating the converter (7) is connected in parallel to the power generator (2) by means of power leads, the compensating converter (7) being connected to the battery (8) by means of power leads, furthermore that the smoothing filter (3) is connected to the current-driven cycloconverter (4), to which the left multiphase electric motor (5) and the right multiphase are connected in series via power conductors an electric motor (6), wherein the control system (9) is connected by means of signal wires to the internal combustion engine (1), the current-powered cyclo-converter (4) and the compensating converter (7); (2), left multiphase electric motor (5), right multiphase electric motor (6) and battery (8). A traction transmission circuit with a current cyclo-converter and multi-phase motors according to claim 1, characterized in that the number of multi-phase electric motors is at least two. A traction transmission circuit with a current cyclo-converter and multi-phase motors according to claims 1 and 2, characterized in that the used multi-phase electric motors are more than three-phase.