Over-voltage and under-voltage management for electric drive system
First Claim
1. A method of voltage supply management for an electric drive system, the electric drive system including a fuel-driven engine having an output for driving an electrical power generator, the electrical power generator providing power to one or more electric drive motors via a supply link, the method comprising:
- receiving a voltage signal indicative of a voltage in the supply link;
receiving one or more condition signals indicative of an operating condition of the electric drive system;
calculating a desired voltage value based on the voltage signal and the one or more condition signals;
differencing the desired voltage value and the voltage signal to yield a voltage error signal indicating an extent to which the voltage signal diverges from the desired voltage value; and
determining whether the voltage error signal is indicative of an over-voltage condition or of an under-voltage condition and dissipating power from the supply link if the voltage error signal is indicative of the over-voltage condition, and imposing a torque command limit with respect to the one or more electric drive motors if the voltage error signal is indicative of the under-voltage condition.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of voltage supply management for an electric drive system includes receiving a voltage signal (1002) indicative of a voltage in a supply link, and one or more condition signals that are indicative of an operating condition of the electric drive system. A difference between a desired voltage value (1008), which is calculated based on the voltage signal (1002) and the one or more condition signals, and the voltage signal (1002) yields a voltage error signal (1014). The voltage error signal (1014) is evaluated to indicate an over-voltage condition or an under-voltage condition. Power is dissipated from the supply link when an over-voltage condition is present and a torque command limit with respect to the one or more electric drive motors (210) is imposed when an under-voltage condition is present.
-
Citations
20 Claims
-
1. A method of voltage supply management for an electric drive system, the electric drive system including a fuel-driven engine having an output for driving an electrical power generator, the electrical power generator providing power to one or more electric drive motors via a supply link, the method comprising:
-
receiving a voltage signal indicative of a voltage in the supply link; receiving one or more condition signals indicative of an operating condition of the electric drive system; calculating a desired voltage value based on the voltage signal and the one or more condition signals; differencing the desired voltage value and the voltage signal to yield a voltage error signal indicating an extent to which the voltage signal diverges from the desired voltage value; and determining whether the voltage error signal is indicative of an over-voltage condition or of an under-voltage condition and dissipating power from the supply link if the voltage error signal is indicative of the over-voltage condition, and imposing a torque command limit with respect to the one or more electric drive motors if the voltage error signal is indicative of the under-voltage condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A computer-readable medium having thereon computer-executable instructions for performing voltage supply management for an electric drive system, the electric drive system including a fuel-driven engine having an output for driving an electrical power generator, the electrical power generator providing power to one or more electric drive motors via a supply link, the computer-executable instructions comprising:
-
instructions for receiving a voltage signal indicative of a voltage in the supply link; instructions for receiving one or more condition signals indicative of an operating condition of the electric drive system; instructions for calculating a desired voltage value based on the voltage signal and the one or more condition signals; instructions for differencing the desired voltage value and the voltage signal to yield a voltage error signal indicating an extent to which the voltage signal diverges from the desired voltage value; and instructions for determining whether the voltage error signal is indicative of an over-voltage condition or of an under-voltage condition and dissipating power from the supply link if the voltage error signal is indicative of the over-voltage condition, and imposing a torque command limit with respect to the one or more electric drive motors if the voltage error signal is indicative of the under-voltage condition. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A controller for controlling an electric drive system and for executing voltage supply management for the electric drive system, the electric drive system including a fuel-driven engine having an output for driving an electrical power generator, the electrical power generator providing power to one or more electric drive motors via a supply link, the controller comprising:
-
an input for receiving a voltage signal indicative of a voltage in the supply link; an input for receiving one or more condition signals indicative of an operating condition of the electric drive system; and a processor for conforming the voltage in the supply link to a desired voltage value associated with the voltage signal and the one or more condition signals by dissipating power from the supply link if the desired voltage value is less than the voltage signal, and imposing a torque command limit with respect to the one or more electric drive motors if the desired voltage value is greater than the voltage signal. - View Dependent Claims (18, 19, 20)
-
Specification