Abstract: Thermal monitoring and analysis of conditions in a power electronic system include sensing of thermal parameters of interest, such as temperature and humidity in an enclosure housing power electronic components. The components are cooled by a liquid coolant flow from a chiller through chiller plates associated with the power electronic components. Air is circulated through the enclosure for heat rejection from the chiller plates. Based on the sensed parameters, factors such as relative humidity and dew point of the cooling air may be computed and evaluated to determine the potential for condensation. Alarms, notices, or recommendations may be output for regulation of the chiller to avoid condensation. The system may also provide for evaluation of installation errors, and degradation of performance over time.

Abstract: Thermal monitoring and analysis of conditions in a power electronic system include sensing of thermal parameters of interest, such as temperature and humidity in an enclosure housing power electronic components. The components are cooled by a liquid coolant flow from a chiller through chiller plates associated with the power electronic components. Air is circulated through the enclosure for heat rejection from the chiller plates. Based on the sensed parameters, factors such as relative humidity and dew point of the cooling air may be computed and evaluated to determine the potential for condensation. Alarms, notices, or recommendations may be output for regulation of the chiller to avoid condensation. The system may also provide for evaluation of installation errors, and degradation of performance over time.

Abstract: A resonant power supply is disclosed. The resonant power supply includes a series resonant configured to convert an input DC voltage to an output DC voltage. The resonant power supply further comprises a converter controller coupled to the series resonant converter and configured to receive a DC voltage feedback signal measured at the output of the series resonant converter, or a resonant current feedback signal representing a resonant current flowing through the series resonant converter. The converter controller is further configured to generate control signals to be applied to the series resonant converter to limit the output DC voltage of the series resonant converter according to the DC voltage feedback signal and a predetermined voltage threshold signal, or to limit the resonant current of the series resonant converter according to the resonant current feedback signal and a predetermined current threshold signal.

Abstract: A gradient amplifier for driving a gradient coil is disclosed. The gradient amplifier includes a direct current (DC) bus for receiving DC voltage generated from a series resonant converter, an inverter coupled to the DC bus configured to receive the DC voltage at the DC bus and convert the DC voltage to generate an output voltage to be applied to the gradient coil, and an inverter controller coupled to the inverter. The inverter controller is configured to generate control signals to control operation of the inverter based at least on a DC voltage feedback signal measured at the DC bus, an output voltage feedback signal measured at the output of the inverter, and a reference output voltage signal indicative of a desired voltage to be achieved at the output of the inverter.

Abstract: A resonant power supply is provided. The resonant power supply comprises a series resonant converter configured to convert an input DC voltage to an output DC voltage to generate an output DC voltage. The series resonant converter includes a switching stage, a resonant inductor, a resonant capacitor, and an isolation transformer. The resonant power supply further comprises a converter controller configured to obtain an actual trajectory radius signal based on a resonant inductor current, a resonant capacitor voltage, and a voltage in association with the isolation transformer. The converter controller is further configured to generate a trajectory radius command signal based on a DC voltage command signal and a DC voltage feedback signal, and to generate control signals to be applied to the switching stage based on the actual trajectory radius signal and the trajectory radius command signal.

Abstract: An electric motor drive system includes a fan configured to cool power electronic components of the electric motor drive system. The electric motor drive system also includes a temperature sensor disposed proximate an air inlet of the fan and configured to sense an ambient temperature of air entering the air inlet. In addition, the electric motor drive system includes a processor communicatively coupled to the temperature sensor and configured to determine at least one of a drive prognostic and a derating requirement based on the sensed ambient temperature.

Abstract: An electric motor drive system includes a fan configured to cool power electronic components of the electric motor drive system. The electric motor drive system also includes a temperature sensor disposed proximate an air inlet of the fan and configured to sense an ambient temperature of air entering the air inlet. In addition, the electric motor drive system includes a processor communicatively coupled to the temperature sensor and configured to determine at least one of a drive prognostic and a derating requirement based on the sensed ambient temperature.

Abstract: Embodiments of the present disclosure are directed towards an electrical equipment system including an electrical equipment component, a thermal management system configured to direct air over features of the electrical equipment component, a rectangular fan housing of the thermal management system, and a fan disposed within the fan housing, wherein an axis of rotation of the fan is offset relative to a geometric center point of the rectangular fan housing.

Abstract: A heat sink for a compact, integral lamp system comprises a bimetal strip or a bimetal heat pipe containing a liquid. With temperature change, the bimetal strip or pipe flexes toward one metal or the other, depending on the physical properties of the particular metals. The deformation of the strip causes heat sink fins to press against the surface of the ballast wall, thereby significantly reducing or eliminating the air gaps therebetween and thus more effectively removing heat from the ballast.

Abstract: A heat sink for a compact, integral lamp system comprises a bimetal strip or a bimetal heat pipe containing a liquid. With temperature change, the bimetal strip or pipe flexes toward one metal or the other, depending on the physical properties of the particular metals. The deformation of the strip causes heat sink fins to press against the surface of the ballast wall, thereby significantly reducing or eliminating the air gaps therebetween and thus more effectively removing heat from the ballast.

Abstract: A multi-mode, two-phase cooling module (10) comprises a first housing portion (20), a second housing portion (30), and a third housing portion (40). Cooling liquid (22) is held in first housing portion (20), and one or more electronic components (24) are mounted onto an external surface of first housing portion (20) for being pool cooled. The second housing portion (30) has one or more spray nozzles (32) secured to one of the internal surfaces, and one or more electronic components (34) mounted onto one of the external surfaces in a position opposite spray nozzles (32). The third housing portion (40) has one or more condensers (42) on the internal surfaces, and one or more heat sinks (44) on the external surfaces. One or more electric fans (46), piezo-electronic fans, or spray nozzles (48) may be provided adjacent to internal surfaces of the condensers (42). The cooling module (10) is made of a thermally conductive material.