In control
An AC inverter control panel (slightly less than 3" horizontally from edge to edge). This type of inverter, more commonly called a variable-frequency drive, is generally used as an efficient motor speed control in many commercial and industrial applications. Similar systems are used in microwave ovens, air-conditioning systems, EVs, and other consumer devices.
One downside to inverter technology is a distinctive, continuous high-pitched whine emitting from the motor. Noises like this are familiar to anyone who has taken a subway or a trolley using newer equipment.
In this instance, I am using a secondhand inverter and motor to power a 35mm projector, giving it variable speed capability and, more importantly, prolonging the time it takes to come up to full speed and slow down to a stop to minimize stress on the mechanism and film.
In control
An AC inverter control panel (slightly less than 3" horizontally from edge to edge). This type of inverter, more commonly called a variable-frequency drive, is generally used as an efficient motor speed control in many commercial and industrial applications. Similar systems are used in microwave ovens, air-conditioning systems, EVs, and other consumer devices.
One downside to inverter technology is a distinctive, continuous high-pitched whine emitting from the motor. Noises like this are familiar to anyone who has taken a subway or a trolley using newer equipment.
In this instance, I am using a secondhand inverter and motor to power a 35mm projector, giving it variable speed capability and, more importantly, prolonging the time it takes to come up to full speed and slow down to a stop to minimize stress on the mechanism and film.