| 摘要 |
A fluid flow control system for an electromagnetic pump having an electromagnetic drive ( 11 ) and a compressor ( 6 ). The control system established a required current in the compressor coils ( 10 ) to control the position and movement of the actuator ( 11 ), the actuator deflecting a diaphragm within the pump to provide the required flow. The control system includes a command signal generator ( 1 ) to create a signal representing the required flow. The signal is applied to a command processor ( 2 ) with any feedback signals ( 13 ) for example, coil current and/or actuator displacement. The command processor ( 2 ) calculates the appropriate drive signal defined by mark-space ratio, repetition rate, and amplitude. The drive signal controls the voltage supplied to the compressor coils ( 11 ) resulting in a required coil current to provide the desired flow. A dc power supply is used to avoid problems regarding main power supply and frequency. |
