DynaMotors, Inc. - Performance Advantages

The DynaMotor™ Integrated Motor/Drive

Performance Advantages

Features Comparison

DynaMotors’™ design innovations provide numerous operating advantages. The chart below compares some of these capabilities with other motor-drives.

How the DynaMotor Outperforms

All Other Motor-Drives

Features & Benefits	1 Phase DC Drive	Switched Reluctance Drive	Permanent Magnet Brushless DC	AC Inverter 1 to 3 Phase	DynaMotor™
Extremely Low RFI Emissions					√
Low Ground Currents					√
High Reliability					√
Requires No Separate Control Box		OPTIONAL	OPTIONAL	OPTIONAL	√
Internal Speed Feedback					√
High Torque at Low Speed	√				√
High Starting Torque	√				√
Requires No Extra Reversing Electronics					√
High Efficiency					√
Brushless		√	√	√	√
Quiet Operation	√		√		√
Unlimited HP Capacity	√			√	√
Low Installation Costs					√
CLICK on specific Features & Benefits for a brief explanation

RFI Data

The DynaMotor™ produces 99% less RFI than all other motor-drive technologies. The graph below illustrates the RFI advantages DynaMotors™ offers relative to variable frequency motor-drives compared to the CE certification standard EN50011 Class A 3M.

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Variable speed drives using pulse width modulation (PWM) produce significant RFI due to their high frequency switching. In addition, PWM reduces reliability through increased motor insulation failure and bearing currents that reduce bearing life. Filters, isolation transformers, and shielded cable can be added to a variable speed motor/drive to reduce RFI at additional cost. DynaMotors™ optical commutation technology eliminates high frequency switching and consequently RFI so much so that “out of the box” it is easily CE compliant to EN50011 Class A 3M.

GFCI Data

The DynaMotor™ is the only AC variable speed technology able to operate on GFCI protected circuits. Conventional technologies utilizing Pulse Width Modulation have high ground currents due to capacitive coupling to ground as well as bearing current. The DynaMotor™ produces less than 1 mA ground current. The graph below illustrates DynaMotors™ ground current compared to three typical manufacturers of conventional single phase drives relative to the Class A GFCI limit.

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Constant Horsepower

The DynaMotor™ produces constant horsepower over a 4 to 1 speed range giving it unparalleled performance compared to other variable speed motor-drives.

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Hi Torque at Low Speed

Standard induction motors run at 3600, 1800, or 900 rpm depending on the number of field poles. While increasing the number of poles reduces the base speed of the motor, torque is NOT increased therefore the horsepower of the motor is reduced. Consequently inductions motors with base speeds lower than 900 rpm are not practical due to their large size and high cost. Lower machine speeds are realized with mechanical speed reduction such as a gear box.

On the other hand, increasing the number for field poles in the DynaMotor not only decreases speed, torque is increased holding horsepower roughly constant. This characteristic permits the DynaMotor to eliminate or simplify mechanical speed reducers. The graph below compares a 1 HP 8 pole DynaMotor to a 1 HP 4 pole induction motor.

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