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  • The development of electrical anemometers
    The Desynn receiver by itself is not capable of producing enough torque to operate the recorder, but the torque amplifier enables the power of a small electric motor to be used for this purpose. This arrangement has the advantage of being operated by a 12 - volt d.c. supply. The torque amplifier, developed by the Admiralty Gunnery Establishment, is not yet in quantity production, and its cost is high .
  • Plant Maintenance Product | Ohio Electric Motors' explosion-proof DC motors feature NEMA frames 48 and 56 | Plant Services
    The explosion-proof motor line features NEMA frames 48 and 56 with an output range from 1/8 HP to 1.25 HP, 12 to 180 volts and 500 to 4000 RPM. Other features include sealed ball bearings with high temperature grease, low loss steel laminations, NEMA-rated magnet wire, high start up torque , precision dynamic balancing, high temperature polyester varnish impregnated armatures, UL and CSA Listed (Class 1, Groups C, D; Class 2... Ohio Electric Motors .
  • Maximizing Overall Efficiency Strategy (MOES) for Power Split Control of a Parallel Hybrid Electric Vehicle
    ...Delptrat S. , Guerra, T.M. , Rimaux, J. and Santin, J.J. , “Equivalent Consumption Minimization Strategy for Parallel Hybrid Powertrains�? , Vehicular Technology Conference , 2002 5 Sciarretta, A. , Back, M. , Guzzella, L. , “Optimal Control of Parallel Hybrid Electric Vehicles�? , 12 (3 ), IEEE Transactions On... ABBREVIATIONS ECMS Equivalent Consumption Minimization Strategy EM Electric Motor FCM Fuel Consumption Minimization HEV Hybrid Electric Vehicle ICE Internal Combustion Engine MOES Maximizing... ...drf Front differential ratio drr Rear differential ratio EM1reg_signal Regenerative braking signal for EM1 ( Volt ) EM2reg_signal Regenerative braking signal... ...discharge condition (W) Proad_realch Power transferred to road in charge condition (W) Preg Regenerative braking power (W) Proad_real Power transferred to road (W) SOC State of charge SOChl High limit of state of... ...state of charge T Torque TEM1_min Minimum EM1 torque...
  • Gimbal actuator
    Also, electronic means are needed to change the 28 vdc power supply to 100 volts , which is required for GA candidate stepping motors . A high starting torque is available with stepping motors. ...torque magnitude available depends on the timing (or phase) and period of the electric pulse relative to... An example torque magnitude-position curve is shown in Figure 12 .
  • A high performance and cost effective drive based power conditioner for critical applications
    Adjustable-speed drives (ASD) have revolutionized the industrial automation, leading to higher efficiency and productivity. Approximately 75% of all electric motor driven applications require a variable speed, variable torque or both [1], in industrial applications such as pumps, fans, compressors, cranes, paper mills, steel mills, rolling mills, elevators, machine tools, etc. The majority of ASD applications are satisfied with general-purpose induction motor drives using volts -per-hertz control [2], with a world market volume of $ 12 billion and an annual growth rate of 15% [3].
  • Advances on IPM technology for hybrid cars and impact in developing countries
    Sustained and extensive research, development, analysis, control and application of IPM motors are progressing in leaps and bounds for the past two decades [ 12 -47], perhaps even exceeding Merrill’s dream [2] and Alger’s expectation. The key requirements of IPM motors and generators for traction applications in hybrid electric vehicles are: Large torque and higher power density, High torque at low speeds for... ...Optimum compromise between motor peak torque and inverter volt -ampere ratings Short term...
  • Downsizing by combustion engines
    Expediently, come the actuators electromagnetic here for insert that can be operated with the available board network voltage of 12 volts and need about 30 W or 10 W electric power in the active operation per cylinder (stand-By). Through the pulse charging, the high torques up to the idling speed can be maintained without it needs a length adjustment of the suction tubes. ...weaknesses concerning the Low-End-Torque as well as the available torque in the transient motor operation.
  • Performance analysis of automotive power systems: effects of power electronic intensive loads and electrically-assisted propulsion systems
    First of all full hybrids operate at voltages ranging from 140 to 350 volts . Even though the battery pack and high voltage wires are well insulated, such a high voltage presents... In addition, the layout and cost of the system becomes much more complicated with a need for torque coupling of the two power sources as well as a large, high performance electric motor . There are negative impedance issues related to multi converter environment of the HEV [ 12 ].
  • Electric drives of mine-lifting machines
    The DFC power circuit and control algorithm are primarily determined by the effect of the overall power of a high torque drive motor on optimal utilization and the supply mains. The power circuit of a direct frequency converter of a DFC electric drive is based on multiphase... In order for the machine to operate, an equivalent 12 pulse circuit with respect to the supply... ...the second transformer are arranged in a triangle (the shift in the secondary volt ages of similar...
  • Quasi-Constant Volume (QCV) Spark Ignition Combustion
    ...time for the combustion event to complete at the TDC region which delivers higher combustion efficiency than... ELECTRIC POWER In the d-q model of the PMAC motor , the stator currents are transformed into an orthogonal frame of reference which is moving synchronously with the rotor flux. ...reference frame is derived from the phase currents via the nonlinear transform [11, 12 ,13]. where Vd... ...the phase inductance and κ is the back EMF constant in the reference frame as volts /radians/second. The electrical torque developed by the motor is proportional to the q-axis current where kt is...
  • Design of power controller for hybrid vehicle
    ...is being used, the other must still supply a large part of the torque or be fitted... In some cases, the combustion engine is the dominant portion (the electric motor turns on only when a boost is needed) and vice versa. To store power, a hybrid uses a large battery pack with a higher voltage than the normal automotive 12 volts .
  • CR4 - Thread: Need recommendation for Power Supply and Speed Control for 12v DC Motor
    ...is my opinion that your project will work, but life expectancy of your motor will not be... 12 volts at ~15amps for a brush DC motor from a scooter is asking for you to be prepared with an extra couple of sets of brushes and a spare set of bearings. No fiery meltdown, just a high maintenance project. Grab yourself a high torque slow rpm motor. One such place you can get one is from an old electric garage roller door...and they...
  • Design procedure of segmented rotor switched reluctance motor for direct drive applications
    Power Appl., 2003, 150, (5), pp. 591–599 9 Nikam, S., Rallabandi, V., Fernandes, B.G.: ‘A high - torque -density permanent-magnet free motor for in-wheel electric vehicle application’, IEEE Trans. Small Electrical Machines, March 1976, pp. 93–96 12 Miller, T.J.E.: ‘Converter volt -ampere requirements of the switched reluctance motor drive’, IEEE Trans.