Harold G Spring

Title: Harold G. Spring: Innovator in Circuit Design

Introduction

Harold G. Spring is a notable inventor based in Garden City, MI (US). He has made significant contributions to the field of circuit design, holding a total of 3 patents. His work primarily focuses on enhancing the efficiency and reliability of electrical systems.

Latest Patents

One of Harold's latest patents is the "Current control/power limiter circuit." This analog circuit provides selectable current control and power limiting for a connected load. A current control loop is combined with a voltage/power control loop to generate a current level signal via an output transistor to control current flow through a load. The circuit monitors the current through the load, maintaining it at a selected value. If a selected power level is exceeded, the current is reduced by the voltage/power control loop. Voltage monitoring and feedback are used to control the operating power for a power level control operational amplifier, thereby maintaining a selected power level. By providing multiple, voltage-dependent gains in the voltage feedback loop, a piecewise linear approximation of a desired power curve can be obtained.

Another significant patent is the "Alternator voltage transient minimization method and apparatus." This invention controls field current in an alternator to maintain the output voltage at a defined level while substantially suppressing transients when the alternator is disconnected from a load. A pair of MOS Insulated Gate Bipolar Transistors (MOSIGBTs) are utilized, one in series and one in parallel with the alternator field winding. The field current is auto-commutated through the parallel connected transient suppression transistor when the regulator transistor is off. This method allows for a controlled discharge of the field winding energy at a high voltage and at an accelerated rate, significantly reducing dissipation time compared to prior art arrangements. This invention is particularly applicable to automotive battery charging systems.

Career Highlights

Harold G. Spring is currently employed at Ford Motor Company Limited, where he continues to innovate and develop advanced electrical systems. His work has contributed to the improvement of automotive technologies, enhancing both performance and safety.

Collaborations

Throughout his career, Harold has collaborated with notable colleagues, including John Michael Miller and Ronald G. Landman. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Harold G. Spring is a