Base drive and overlap protection circuit

Patent · Sat Jan 01 00:00:00 EST 1983

OSTI ID:864482

Gritter, David J ^[1]

---

1. Southfield, MI

An inverter (34) which provides power to an A. C. machine (28) is controlled by a circuit (36) employing PWM control strategy whereby A. C. power is supplied to the machine at a preselectable frequency and preselectable voltage. This is accomplished by the technique of waveform notching in which the shapes of the notches are varied to determine the average energy content of the overall waveform. Through this arrangement, the operational efficiency of the A. C. machine is optimized. The control circuit includes a microcomputer and memory element which receive various parametric inputs and calculate optimized machine control data signals therefrom. The control data is asynchronously loaded into the inverter through an intermediate buffer (38). A base drive and overlap protection circuit is included to insure that both transistors of a complimentary pair are not conducting at the same time. In its preferred embodiment, the present invention is incorporated within an electric vehicle (10) employing a 144 VDC battery pack (32) and a three-phase induction motor (18).

• Assignee: Eaton Corporation (Cleveland, OH)
• Patent Number(s): US 4371824
• OSTI ID: 864482
• Country of Publication: United States
• Language: English

Related Subjects

base
drive
overlap
protection
circuit
inverter
34
provides
power
machine
28
controlled
36
employing
pwm
control
strategy
whereby
supplied
preselectable
frequency
voltage
accomplished
technique
waveform
notching
shapes
notches
varied
determine
average
energy
content
overall
arrangement
operational
efficiency
optimized
microcomputer
memory
element
receive
various
parametric
inputs
calculate
data
signals
therefrom
asynchronously
loaded
intermediate
buffer
38
included
insure
transistors
complimentary
pair
conducting
time
preferred
embodiment
incorporated
electric
vehicle
10
144
vdc
battery
pack
32
three-phase
induction
motor
18
protection circuit
control data
average energy
provides power
induction motor
memory element
base drive
control circuit
electric vehicle
preferred embodiment
control strategy
data signals
data signal
energy content
receive various
pwm control
waveform notching
three-phase induction
strategy whereby
vdc battery
various parametric
machine control
preselectable frequency
preselectable voltage
operational efficiency
parametric inputs
overall waveform
optimized machine
battery pack
complimentary pair
employing pwm
intermediate buffer
selectable frequency
dc battery
/318/361/363/