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1. 发明授权

US5115181A Power converter for a switched reluctance motor 失效
标题翻译：用于开关磁阻电机的功率转换器
公开(公告)号：US5115181A
公开(公告)日：1992-05-19
申请号：US593122
申请日：1990-10-05
申请人： Pradeep K. Sood
发明人： Pradeep K. Sood
IPC分类号： H02P25/08
CPC分类号： H02P25/0925
摘要： Power conversion apparatus (10) for an n-winding switched reluctance motor (M). A rectifier circuit (12) rectifies line voltage supplied to the motor. A switching circuit (14) supplies, at any one time, electrical energy to the motor winding most capable of converting it to mechanical work. A storage capacitor (C1) stores any unconverted portion of the energy and returns it to the winding during subsequent cycles. The switching circuit provides a substantially long conduction period 2 (.theta.) for supplying electrical energy to the motor during each line voltage cycle. This permits use of a substantially smaller energy storage capacitor and results in a higher input power factor for circuit operation. Circuits for precharging the storage capacitor are eliminated. The switching circuit is capable of more modes of operation than previous circuits, while using fewer components, and therefore provides a lower cost design.
摘要翻译：用于n绕组开关磁阻电动机（M）的电力转换装置（10）。整流电路（12）对提供给电动机的线路电压进行整流。开关电路（14）可以在任何时候将电能提供给最能将其转换为机械作业的电动机绕组。存储电容器（C1）存储任何未转换的能量部分并在随后的周期期间将其返回给绕组。开关电路在每个线路电压周期期间提供用于向电动机提供电能的基本长的导通周期2（θ）。这允许使用基本上较小的储能电容器并且导致用于电路操作的更高的输入功率因数。消除了对存储电容器进行预充电的电路。与之前的电路相比，开关电路能够具有更多的操作模式，同时使用更少的元件，因此提供了较低成本的设计。

2. 发明授权

US5241257A Drive system for household appliances 失效
标题翻译：家用电器驱动系统
公开(公告)号：US5241257A
公开(公告)日：1993-08-31
申请号：US908758
申请日：1992-07-01
申请人： Craig J. Nordby , Pradeep K. Sood , Marco Venturini , Ciaran O'Breartuin
发明人： Craig J. Nordby , Pradeep K. Sood , Marco Venturini , Ciaran O'Breartuin
IPC分类号： D06F37/30
CPC分类号： D06F37/304 , Y02B40/52
摘要： A drive system for a household appliance incorporates an electric motor. A control panel allows the user of the appliance to select from among various performance options which the appliance is able to perform. A microprocessor, functioning as a first control unit, is responsive to the selections and to various appliance sensors monitoring operational status of the appliance to control the operation of various components within the appliance by which the selected options are performed. An AC-DC converter and inverter supply electrical power to the motor. A second control unit, operating at a relatively faster rate of speed than the microprocessor, controls the supplying of power to the electric motor to achieve proper operation thereof.
摘要翻译：用于家用电器的驱动系统包括电动机。控制面板允许设备的用户从设备能够执行的各种性能选项中进行选择。用作第一控制单元的微处理器响应于选择以及监控设备的操作状态的各种设备传感器，以控制设备中各种组件的操作，通过该设备执行所选择的选项。 AC-DC转换器和逆变器为电机提供电源。以比微处理器更快的速度运行的第二控制单元控制向电动机供电以实现其正常操作。

3. 发明授权

US5197667A HVAC low power usage circulation blower 失效
标题翻译： HVAC低功率使用循环风机
公开(公告)号：US5197667A
公开(公告)日：1993-03-30
申请号：US643180
申请日：1991-01-18
申请人： Benjamin Bowsky , Jerry D. Lloyd , Bernard Brown , Pradeep K. Sood
发明人： Benjamin Bowsky , Jerry D. Lloyd , Bernard Brown , Pradeep K. Sood
IPC分类号： F24F11/04 , F24F11/00 , G05D23/275
CPC分类号： F24F11/0009 , G05D23/1909 , G05D23/275 , F24F11/0012 , F24F11/0015 , F24F2011/0036 , F24F2011/0038 , Y10S236/09
摘要： A field installable device for a conventional heating and air conditioning system (HVAC) is provided which operates a blower fan in conjunction with a standard thermostat. Presently, HVAC systems operate in four modes: heating, cooling, off and fan "on". The device includes a multi-pole, multi-speed motor and a control operatively connected between the thermostat and the motor. With the fan switch in the "on" position and heating or cooling called for, the control causes the blower to operate at a high speed, which may be different for heating or cooling. When the pre-selected temperature is reached the particular thermal operation (i.e., heating or cooling) is stopped. The control switches the motor to a speed substantially slower than the operating condition speed to provide continuing air circulation until the thermostat again calls for thermal operation. With the switch in "auto" position, the blower operates similarly to present systems.

4. 发明授权

US5235504A High power-factor converter for motor drives and power supplies 失效
标题翻译：用于电机驱动和电源的高功率因数转换器
公开(公告)号：US5235504A
公开(公告)日：1993-08-10
申请号：US670031
申请日：1991-03-15
申请人： Pradeep K. Sood
发明人： Pradeep K. Sood
IPC分类号： H02M7/06 , H02M1/00 , H02M1/42 , H02M3/158 , H02M7/12 , H02M7/21
CPC分类号： H02M1/4208 , H02M3/1582 , H02M1/4225 , H02M2001/4291 , Y02B70/126
摘要： A high power-factor converter (50) for use with motor drives and power supplies. A first and "buck"-type converter section (62) is connected to an a.c. voltage source. This section provides an output voltage having preselected voltage characteristics. This section is operational during that portion of an input voltage cycle in which the input voltage level exceeds that of the output voltage level. A second and "boost"-type converter section (70) is also connected to the voltage source. This second section also provides the output voltage, and is operational during that portion of the input voltage cycle in which the output voltage level exceeds that of the input voltage level. A control circuit (66) is responsive to the relative levels of the input and output voltages to operate the first and second converter sections on a time sharing basis in which converter operation is switched between the two converter sections as a function of the sensed actual output voltage characteristics compared to the preselected characteristics. This permits the converter to maintain a nearly full conduction angle, and therefore a high power factor, for any level of output voltage in a range from zero volts to voltage levels higher than the peak input voltage level.

5. 发明授权

US5070565A Unbalanced load detection system and method for a household appliance 失效
标题翻译：不平衡负载检测系统和家用电器的方法
公开(公告)号：US5070565A
公开(公告)日：1991-12-10
申请号：US338999
申请日：1989-04-17
申请人： Pradeep K. Sood , Douglas M. Petty
发明人： Pradeep K. Sood , Douglas M. Petty
IPC分类号： D06F33/02 , D06F37/20
CPC分类号： D06F37/203
摘要： Load unbalance in an inverter driven washing machine is detected by examining the ripple in the DC inverter bus current. Ripple above a predetermined level is indicative of load unbalance. If the ripple indicates the load is unbalanced, the distribution cycle of the washing machine is attempted again in an attempt to more nearly balance the clothes. After a certain number of tries, if the load is still unbalanced the spin cycle is aborted. If the ripple falls below a predetermined level before the maximum number of tries is reached, the spin cycle is started. The frequency of operation is checked during the spin cycle to adjust the cycle time to the particular degree of load balance achieved.

6. 发明授权

US5420492A Method and apparatus of operating a dynamoelectric machine using DC bus current profile 失效
标题翻译：使用直流母线电流曲线来操作电动机的方法和装置
公开(公告)号：US5420492A
公开(公告)日：1995-05-30
申请号：US4411
申请日：1993-01-14
申请人： Pradeep K. Sood , james L. Skinner , Douglas M. Petty
发明人： Pradeep K. Sood , james L. Skinner , Douglas M. Petty
IPC分类号： H02P6/08 , H02P6/18 , H02P5/40 , H02P1/26
CPC分类号： H02P6/18 , H02P6/08 , Y02P80/116
摘要： A dynamoelectric machine, for example, a brushless permanent magnet motor (M) has a plurality of stator windings (S) and a rotor (T) which rotates with respect to the windings. Apparatus (10) is provided for controlling winding commutation with respect to the rotor. A DC bus (14) supplies current to the windings. The current waveshape has characteristics which are a function of the commutation angle with respect to the windings. Current magnitude and waveshape are sensed by a sensing unit (22) and the sensed waveshape is sampled to obtain commutation information. An inverter (20) successively energizes and de-energizes the respective stator windings. A controller (26) obtains samples of the waveshape, and processes the information obtained by the sampling to control winding commutation. The controller controls the inverter operation to provide a commutation angle which optimizes motor performance and efficiency for a particular set of motor operating conditions. To do this, the processor evaluates slope and amplitude information from the sampled DC bus current waveshape, determines if the waveshape corresponds to a desired waveshape representing a desired commutation angle, and adjusts the commutation frequency produced by the inverter, if necessary, to obtain the desired waveshape.
摘要翻译：电动机，例如，无刷永磁电动机（M）具有相对于绕组旋转的多个定子绕组（S）和转子（T）。提供装置（10）用于控制相对于转子的绕组换向。 DC总线（14）向绕组提供电流。当前波形具有相对于绕组的换向角的函数的特性。电流幅度和波形由感测单元（22）感测，并且感测的波形被采样以获得换向信息。逆变器（20）相应地对相应的定子绕组通电和断电。控制器（26）获得波形的采样，并处理通过采样得到的信息以控制绕组换向。控制器控制变频器运行，以提供换向角，从而优化电机运行条件下的特定电机性能和效率。为此，处理器从采样的直流总线当前波形图中评估斜率和振幅信息，确定波形是否对应于表示期望换向角的期望波形，并且如果需要则调整由逆变器产生的换向频率，以获得想要的波形

7. 发明授权

US4986092A Speed control for inverter driven washing machine 失效
标题翻译：变频驱动洗衣机速度控制
公开(公告)号：US4986092A
公开(公告)日：1991-01-22
申请号：US336886
申请日：1989-04-12
申请人： Pradeep K. Sood , John S. Thorn
发明人： Pradeep K. Sood , John S. Thorn
IPC分类号： D06F21/02 , D06F33/02 , D06F37/30 , H02P27/06
CPC分类号： D06F37/304 , Y02B40/52
摘要： A washing machine has a rotatable drum for holding items being washed and water for washing the items. The number of items in the drum and the amount of water in the drum may vary. Power is supplied from an inverter to a motor which rotates the rotatable drum. A speed control responsive to the inverter current regulates the drum rotating speed within a selected range.

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