Universal motor control with built in self timer
The universal motor control circuit described operates by regulating the power supplied to a commutator motor, allowing for precise control over the motor's speed and operation time. It incorporates a self-timer feature, which automatically disconnects the motor after a predetermined period, thus preventing overheating or damage due to prolonged operation.
The circuit typically includes a silicon-controlled rectifier (SCR) configuration, with SCR1 and SCR2 managing the power flow to the motor. SCR1 is responsible for the initial control, while SCR2 can be upgraded to a higher-rated component, such as the C30B SCR, to accommodate motors under heavy loads. This enhancement is critical for ensuring the reliability and longevity of the circuit when dealing with high current demands.
The timing mechanism is achieved through the use of capacitor C1, which, when adjusted, alters the time delay before the motor is turned off. Increasing the capacitance of C1 will extend the delay period, allowing for longer operational times before automatic shutdown occurs. This feature is particularly useful in applications where the motor must run for a specific duration without manual intervention.
Overall, this circuit provides a robust solution for controlling universal motors, with the flexibility to adapt to various operational requirements through component selection and configuration adjustments.Universal motor control with built-in self-timer. Use this circuit only with motors having commutators. If heavy motor loads are anticipated, use a larger-rated C30B SCR in place of the GE-X1 for SCR2. To increase the time delay increase the capacitance of 01 (courtesy General Electric Company). 🔗 External reference
Related Circuits
ECEN 2250 myDAQ Experiment Capacitors and the 555 Timer. The experiment involving capacitors and the 555 timer within the ECEN 2250 myDAQ framework focuses on understanding the behavior of capacitors in electronic circuits and the functionality of the 555 timer...
The programmer utilizes a serial signaling scheme to program the chip while it is in-circuit. The signaling is transmitted through the programming clock (PGC or ICSPCLK) and the programming data (PGD or ICSPDAT) pins. Additionally, the MCLR/VPP pin serves...
The circuit is constructed using two 555 timer integrated circuits, designated as U1 and U2. U1 is configured as a variable duty cycle oscillator with a fixed time period of approximately 0.1 seconds. The duty cycle can be adjusted...
The anatomy of two ignition experiments revealed a common issue, specifically that both ends of the ignition coil are equipped with a diode. This design choice by manufacturers has implications for performance. The ignition coil generates a negative half-cycle...
This type of design can produce a very high amperage current for a fraction of a second that can be used to do some useful work if properly harnessed. The switching device could be a rotating spark gap as...
This is an image Schematic. No Description available. The provided input indicates that there is an image schematic without any accompanying description. In scenarios where a schematic is presented, it typically contains graphical representations of electronic components and their...