Breitzmann
John Breitzmann, Richardson, TX US
Patent application number | Description | Published |
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20110025580 | ANTENNA SYSTEM AND CONNECTOR FOR ANTENNA - A connector for an RF antenna for coupling the RF antenna to a device is formed from a base. A collar is provided for receiving and coupling to an RF antenna. A coupling structure extends from the base and engages the device to facilitate coupling of the antenna to the device. An antenna system is also formed from an RF antenna and a device to which the RF antenna couples and for which the RF antenna is used. The antenna system further includes a connector formed from a base, a collar for receiving and coupling to the RF antenna and a coupling structure that extends from the base and engages the device to facilitate coupling of the antenna to the device. | 02-03-2011 |
Robert Breitzmann, South Russell, OH US
Patent application number | Description | Published |
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20150091485 | SYSTEMS AND METHODS FOR CONTROLLING A DISCONNECT SWITCH VIA A NETWORK - A system for controlling a disconnect switch via a network may include a disconnect switch and a drive. The disconnect switch may receive alternating current (AC) power from an AC power supply, and the drive may then receive the AC power via the disconnect switch. The drive may include a processor that may communicatively couple to the disconnect switch. As such, the processor may control a drive operation that corresponds to the drive and control a disconnect operation that corresponds to the disconnect switch. | 04-02-2015 |
Robert J. Breitzmann, South Russel, OH US
Patent application number | Description | Published |
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20090212732 | UNIVERSAL ADAPTIVE TORQUE CONTROL FOR PM MOTORS FOR FIELD-WEAKENING REGION OPERATION - The invention includes a motor controller and method for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by, among other things, receiving a torque command, determining a normalized torque command by normalizing the torque command to a characteristic current of the motor, determining a normalized maximum available voltage, determining an inductance ratio of the motor, and determining a direct-axis current based upon the normalized torque command, the normalized maximum available voltage, and the inductance ratio of the motor. | 08-27-2009 |
20100320948 | Method and Apparatus for Increased Current Stability in a PWM Drive - The present invention provides an improved current regulator for PWM based drives for electric motors. The invention provides compensation for the rotor position signal for delays introduced due to the PWM algorithm and for digital sampling present in such a drive. Current regulator commonly operate in a two-phase reference frame, requiring forward and reverse coordinate transformations between the physical current values and the two-phase reference frame variables. The present invention provides an improved compensation in the forward transformation by determining the phase lag between the commanded voltage reference and the output voltage reference and by further compensating the forward transformation for errors introduced due to sampling the current either at different sampling instances than the rotor position or at multiple sampling instances during a carrier period. Additionally, compensation during the reverse transformation is provided to compensate for errors introduced due to sampling the current and rotor position. | 12-23-2010 |
20130094258 | ACTIVE FRONT END POWER CONVERTER WITH DIAGNOSTIC AND FAILURE PREVENTION USING PEAK DETECTOR WITH DECAY - Active front end power conversion systems are presented having a peak detector with adjustable decay providing a signal to an overload protection component to selectively discontinue rectifier switching control signals for protection of active rectifier switches during unbalanced line voltage conditions. | 04-18-2013 |
Robert J. Breitzmann, South Russell, OH US
Patent application number | Description | Published |
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20100054004 | METHOD AND APPARATUS FOR PHASE CURRENT BALANCE IN ACTIVE CONVERTER WITH UNBALANCED AC LINE VOLTAGE SOURCE - Active power converters and methods are presented for converting input electrical power to output electrical power with converter switching control in which the individual phase voltage command values are compensated according to phase line voltage imbalances to compensate the converter control to provide balanced phase currents in the presence of unbalanced phase supply line voltages. | 03-04-2010 |
20140265596 | METHOD AND APPARATUS FOR ISLANDING DETECTION FOR GRID TIE CONVERTERS - Methods and apparatus are presented for unintentional islanding detection for grid tie converters in which the phase angle disturbance is introduced by modification of grid side converter switching control signals and a mismatch of reactive power between generation and the grid load is formed upon the occurrence of unintentional islanding, where the applied phase disturbance is determined according to two pre-defined curves to form an equivalent positive feedback at different frequencies to prevent the converter from forming an island at a new stable frequency after the grid is disconnected. | 09-18-2014 |
20140320056 | METHODS AND APPARATUS FOR ACTIVE FRONT END FILTER CAPACITOR DEGRADATION DETECTION - Apparatus and methods are provided for detecting degradation of delta-connected filter capacitors in an active front end (AFE) power converter, in which delta circuit capacitor leg currents are calculated based on measured branch circuit currents, and filter capacitor impedance values are computed based on the calculated leg currents as well as measured line-to-line voltages and corresponding phase angles for comparison with one or more thresholds to selectively detect degradation of the filter capacitors. Further apparatus and methods are provided for detecting degradation of Y-connected filter capacitors by computation of fundamental frequency RMS impedance values as ratios of RMS capacitor voltages and RMS circuit branch currents, and comparison of the calculated RMS impedance values with one or more thresholds. | 10-30-2014 |
20140368143 | METHOD AND APPARATUS FOR OVERVOLTAGE PROTECTION AND REVERSE MOTOR SPEED CONTROL FOR MOTOR DRIVE POWER LOSS EVENTS - Apparatus and methods are presented for mitigating overvoltages and limiting reverse motor speeds for motor drive power loss events, in which a first power dissipation circuit is enabled at the motor drive output to limit reverse rotation of a driven motor load when motor drive power is lost, and a second power dissipation circuit in a DC bus circuit is used to mitigate over voltages following restoration of motor drive power. | 12-18-2014 |