Quality Characteristics of Motor - Safety and Reliability
For Any Kind of Product, Safety Is a Quality Bottom Line, And Reliability Is the Basic Requirement for People to Purchase Products. As a Power Provider, Motor Products Are Particularly Widely Used, Especially in Special Areas of Application, Safety and Reliability Is Particularly Special and Important.
 
GB /T 14711 Is a Small and Medium-Sized Asynchronous Motor Safety Control Requirements Standard, The Standard from the Motor Insulation Resistance, Winding to the Ground Insulation, Three-Phase Motor Insulation, Winding Turn to Turn Insulation, Speed, Overload, Protection Level, Environment, Service Life and Life Have Made Specific Provisions.
Insulation Resistance, Windings to Ground, Phase and Turn Insulation, Is the Electrical Performance Requirements of Motor Windings, If There Are Such Quality Problems, The Motor Will Fail and Burn; for the Control of This Problem, The Motor Manufacturer Takes the Standardized Design as the Premise, And Will Check and Control the Semi-Finished Electrical Products and the Whole Machine Product Test, But the Products That Pass the Test but Have Hidden Dangers Will Cause Greater Losses to the Use of Customers.
 
01.Motor Speed and Overload
Overspeed and Overload Is a Performance Requirement for the Strain Resistance of Motor Products. Motor Type Test Control, In Accordance with the Following Principles: General Purpose Motor Should Be Able to Withstand 1.2 Times the Maximum Rated Speed for 2 Minutes of No-Load Operation, No Mechanical Damage or Residual Deformation; Under the Rated Voltage and Frequency, The Continuous and Short-Time Rated Asynchronous Motor Should Be Able to Withstand 1.6 Times, The Intermittent Rated Motor Should Be Able to Withstand 2 Times the Rated Torque, Lasting 15 Seconds Without Damage, And Do Not Block When Gradually Increasing the Torque, Or the Speed Does Not Change.
 
02.Motor Protection Level
The Protection Level of the Motor Shell Is to Prevent the Human Body from Touching the Charged or Rotating Part Inside the Housing, To Prevent Water Droplets or Solid Foreign Bodies from Entering the Motor to Have Harmful Effects, And the Protection Level of the Motor Shell Should Meet the Requirements of the Product Technical Conditions. For This Requirement, Specific Provisions Have Been Made in the Product Design Link, The Problem Often Lies in the Mismatch Between the Customer's Selection and the Actual Use Condition, Such as the Application of Ip23 Motor in a Dusty Environment, Especially with Conductive Materials in the Dust, The Damage to the Motor Winding Is Particularly Serious, Resulting in Electrical Quality Problems in a Very Short Time.
 
In Addition to the Quality Threat to the Winding, There Is the Protection of the Junction Box Part and the Bearing System, The Occurrence of These Problems May Be the Manufacturer, That Is, The Fact That There Is a Sheep's Head to Sell Dog Meat, The Actual Protection Level of the Motor and the Nameplate Identification Do Not Cause Some Problems That Should Not Occur in the Actual Operation of the Motor, Such as Conductive Dust Entering the Junction Box. The Electrical Clearance and Creepage Distance of the Terminal Become Smaller, And the Dust Entering the Bearing Leads to the Motor Bearing Noise and Lubrication Failure.
 
03.The Impact of Special Environmental Conditions
In Order to Ensure the Reliability of Motor Operation, The Operating Environment Will Be Specified in the Technical Conditions of the Product, Such as Ambient Temperature, Altitude, Humidity, Power Supply Voltage, Power Supply Frequency, Etc., For the Special Environment Motor Other Than the Technical Conditions, Necessary Measures Need to Be Taken in the Design and Manufacturing of the Motor. If There Is High Humidity, Salt Spray, Mold, Insect Pests, Abnormal Vibration Impact, Flammable, Explosive, Corrosive Gas or Conductive Dust in the Air, Appropriate Protective Measures Should Be Taken, And Subjected to Environmental Tests Specified in the Standard.
 
For the Power Supply Conditions, The Motor Product Will Specify the Safety of Operation Within a Certain Deviation Range, When the Input Power Supply Elements Have a Large Deviation, The Safety of Motor Operation Will Have Problems, Such as the Most Common High or Low Power Supply Voltage; the Power Frequency Is Inconsistent with the Expected Design, And the Power Frequency Motor Is Used According to Frequency Conversion, Etc., Which Will Lead to Abnormal Operation of the Motor or Heating and Burning Problems in a Short Time.
 
The Warranty Period and Service Life of the Motor Is Based on the Commitment Under Normal Use and Maintenance Conditions, Under Normal Time and Operating Conditions, The Quality Assurance of the Motor Is a Requirement for the Manufacturer, And the User of the Motor Is Required to Carry out Reasonable Use and Maintenance in Accordance with the Technical Requirements, And Finally Achieve the Purpose of Smooth Operation of the Motor.