Drive unit for an electrically operated vehicle
First Claim
1. A drive unit for electrically driven vehicles for driving at least one wheel, said drive unit comprising:
- two electric motors;
an electronic control unit controlling current fed to said two electric motors such that when accelerating from a standstill and in a mow motor speed range, said two electric motors are fed in an electrical series arrangement, and when in a higher motor speed range, the two electric motors are fed in an electrical parallel arrangement, each of the two electric motors contributing 50% to the electrical performance; and
an accumulator feeding energy to said two electric motors, said two electric motors mechanically connected to the at least one wheel during all modes of operation, said two electric motors electronically controlled between all the modes of operation, and said two electric motors operating at the same speed during all the modes of operation.
1 Assignment
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Accused Products
Abstract
A drive unit for electrically-operated vehicles. Two electromotors which can be electrically switched in series or in parallel, optionally, are used in the drive unit in order to obtain a high degree of efficiency and a high degree of overload protection for the batteries. The motors can also be controlled with pulse width modulation by means of an electronic control unit, which enables the current load of the batteries to be kept within stipulated limits. Other advantages of the invention lie in the better use that is made of the construction space, the lower production costs and the use of economical construction materials.
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Citations
11 Claims
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1. A drive unit for electrically driven vehicles for driving at least one wheel, said drive unit comprising:
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two electric motors;
an electronic control unit controlling current fed to said two electric motors such that when accelerating from a standstill and in a mow motor speed range, said two electric motors are fed in an electrical series arrangement, and when in a higher motor speed range, the two electric motors are fed in an electrical parallel arrangement, each of the two electric motors contributing 50% to the electrical performance; and
an accumulator feeding energy to said two electric motors, said two electric motors mechanically connected to the at least one wheel during all modes of operation, said two electric motors electronically controlled between all the modes of operation, and said two electric motors operating at the same speed during all the modes of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification