[특허]Transmissionless drive system

Transmissionless drive system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02P-001/16
출원번호	US-0344682 (1982-02-01)
발명자 / 주소	McCarthy Milton E. H. (359 Warwick Ave. Ormond Beach FL 32074)
인용정보	피인용 횟수 : 34 인용 특허 : 0

초록 ▼

A continuously variable transmissionless drive system providing maximum torque at low speeds. The system is usable in a hybrid vehicle having a prime mover, such as an internal combustion engine, operated at its optimum rpm for efficiency. The prime mover drives a pair of amplidynes which in turn operate a pair of dc motors to produce rotation of the output shaft for driving the wheels of the vehicle via a novel differential drive system which drives the output shafts in which the effective gear ratio may be externally controlled to vary from a very high step down ratio producing very high torque to a one-to-one ratio for driving at a constant speed. Each drive motor is connected to a separate bevel gear in the differential and control of the output shaft speed and torque is obtained by controlling the speed and direction of rotating of the bevel drive gears. When the two bevel drive gears are rotating at the same rpm but in opposite directions, no output is obtained from the output shafts of the differential unit. When there is a difference in speed between the two bevel drive gears, a spider assembly in the differential unit will rotate at an rpm equal to one-half of the difference in the speeds of the two bevel drive gears and will drive the output shafts at that rpm. The speeds of the motors are controlled by controlling two closed loop servo systems including the amplidynes using two rpm reference signals produced by a network of synchros and small dc control motors. The dc control motors are responsive to signals generated by a foot pedal control operating an acceleration control system.

대표청구항 ▼

A vehicle driving system comprising: a mechanical differential means having a first input shaft for being driven at a rotational speed of ±wS1, a second input shaft for being driven at a rotational speed of ±wS2, and an output shaft, said differential means for driving said output shaft at a rotational speed wS=½(±wS1±wS2) where the algebraic sign indicates direction of rotation; a first controllable speed drive motor connected to said first input shaft for rotation thereof; a second controllable speed drive motor connected to said second input shaft for rotation thereof; a first power source connected to said first drive motor, said first power source including control means for controlling the speed of said first drive motor; a second power source connected to said second drive motor, said second power source including control means for controlling the speed of said second drive motor; first rpm comparison means connected to said first drive motor for sensing the rpm wM1 thereof and having an input for receiving an rpm reference signal wR1, said comparison means for producing a first output error signal proportional to wR1-wM1 at an output thereof, said output connected to said control means of said first power source whereby said first drive motor, said first power source, and said first comparison means forming a first closed loop servo system; second rpm comparison means connected to said second drive motor for sensing the rpm wM2 thereof and having an input for receiving an rpm reference signal wR2, said second comparison means for producing a second output error signal proportional to wR2-wM2 at an output thereof, said output connected to said control means of said second power source whereby said second drive motor, said second power source, and said comparison means forming a second closed loop servo system; torque reference means for producing a selectable torque rpm reference signal wT; acceleration reference means for producing a selectable acceleration rpm reference signal wA; first calculation means connected to said torque reference means and said acceleration reference means for calculating said rpm reference signal wR1 from the algebraic sum of wT and wA, said first calculation means having an output for said sum connected to said input of said first rpm comparison means; and second calculation means connected to said torque reference means for calculating said rpm reference signal wR2 from the algebraic difference of wT and wA, said second calculation means having an output for said difference connected to said input of said second rpm comparison means; whereby said output shaft rotates at a rotational speed wS equal to the rpm represented by acceleration rpm reference signal wA.

이 특허를 인용한 특허 (34)

McCarthy ; deceased Milton E. H. (359 Warwick Ave. late of Ormond Beach FL) McCarthy ; representative by Helen (359 Warwick Ave. Ormond Beach FL 32074), Anti-skid apparatus.
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Zing, Christopher P.; Wiest, Joachim H.; Fung, Henry T., System, architecture, and method for minimizing power consumption and increasing performance in electric vehicles.
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