Abstract: Disclosed is an AC motor drive (600) for a three phase, 400 Hz., AC induction motor. The application is a constant speed, constant load application. An AC power source with a wide variation in voltage and frequency is rectified to establish a DC bus. A three phase full wave bridge inverter operates on this source. A cascaded sinusoidal reference signal generator (225) generates three sinusoidal voltages 120° phase shifted from one another. These pure sinusoidal reference help reduce harmonic currents. A high PWM frequency is used to operate the power switches of the bridge to reduce current harmonics. The speed regulator (220) generates an error voltage between a speed command voltage and a feedback of DC voltage that is equivalent to the RMS value of the terminal voltage of the motor for speed regulation. The harmonic content of the DC bus current is extracted to provide short circuit protection.

Abstract: Disclosed is an AC motor drive (600) for a three phase, 400 Hz., AC induction motor. The application is a constant speed , constant load application. An AC power source with a wide variation in voltage and frequency is rectified to establish a DC bus. A three phase full wave bridge inverter operates on this source. A cascaded sinusoidal reference signal generator (225) generates three sinusoidal voltages 120° phase shifted from one another. These pure sinusoidal reference help reduce harmonic currents. A high PWM frequency is used to operate the power switches of the bridge to reduce current harmonics. The speed regulator (220) generates an error voltage between a speed command voltage and a feedback of DC voltage that is equivalent to the RMS value of the terminal voltage of the motor for speed regulation. The harmonic content of the DC bus current is extracted to provide short circuit protection.

Abstract: Product containers, especially child-resistant product dispensers, and methods of use thereof. In some particular embodiments, provided herein are child-resistant medication dispensers, and methods of use thereof for administering medications to individuals that may suffer from manual dexterity problems. The disclosure is particularly useful in dispensing orally dissolving medications intended for sublingual application, such as orally dissolving strips. In one embodiment of the disclosure a medication dispenser is disclosed comprising a container having an opening and an inner chamber, a cap configured to close the opening of the container and provide a child-resistant locking engagement with the container, and a tray deployable in the chamber of the container and configured to hold at least one pouch carrying a dose of medication. The tray can include a support configured to hold one or more pouches when the tray and pouches are deployed within the container.

Abstract: A modified power converter circuit utilizes an RLC circuit tuned to the frequency of any instability in the power converter circuit in order to remove the instability in the circuit output. In one embodiment, a pair of RLC circuits are connected in parallel across the input capacitor and output capacitor of the power circuit topology, respectively. The capacitor and inductor of each RLC circuit act as filters having a period with the same value as the instability created by interaction of the respective input or output capacitor with the isolation transformer inductance and expose the resistor within each the RLC circuit to only the frequency of instability.