Electrical propulsion systems for a golf car
US5565760A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Nov 2, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for preventing overspeed of an electrically powered golf car having a shunt wound direct current electric motor with an armature winding and a field winding serially connected to respective switching devices and to a source of on-board direct current electric power. The golf car includes a control adapted and connected to regulate the current in each of the armature and field windings for controlling speed in response to an operator's command. The golf car incorporates overspeed detection by sensing the magnitude of current in each of the armature winding and the field winding and detecting when the current in the armature winding reverses direction. The magnitude of the armature winding current upon such reversal is compared to a preselected value and an overspeed signal generated when the reverse current magnitude exceeds the preselected value. The field current is then controlled, in response to the overspeed signal, to limit the speed of the golf car to inhibit the overspeed condition. Additionally, the voltage at the motor armature winding is monitored during a time period when the motor is in a non-energized condition and a motion signal indicative of m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.