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  • 12 Practical Knowledge Points about Frequency Converters

    A frequency converter consists of four main parts: rectifier, DC link (intermediate DC circuit), inverter, and control circuit. The rectifier converts the mains AC into DC; the DC link filters and stores energy; the inverter, under the command of the control circuit, converts the DC back into AC with adjustable frequency and voltage for the motor.

    2026/07/30 TECO-ELEC 8

  • On the Matching Relationship Between Frequency Converters and Motors

    Driving motors with frequency converters has become an irreversible trend. In practice, however, improper matching between the converter and the motor often leads to various issues.

    2026/07/17 TECO-ELEC 13

  • Composition and Working Principle of a Frequency Converter

    A frequency converter (also called a variable frequency drive, VFD) is a power control device that converts a fixed‑frequency AC supply into an AC output with adjustable frequency and voltage. Most converters in use today adopt the AC‑DC‑AC conversion method (VVVF or vector control).

    2026/07/16 TECO-ELEC 9

  • High-Voltage Motor Current Calculation

    In industrial power distribution and equipment selection, calculating the rated current of a high‑voltage motor is a fundamental yet crucial task. Many engineers new to high‑voltage systems may think it is complicated, but in fact its core principle is the same as that for low‑voltage motors – it all comes down to power, voltage, and power factor.

    2026/07/10 TECO-ELEC 23

  • CE, ATEX, IECEx – Not the Same Thing! So What Are They?

    In short, CE marking is the “passport” for products to enter the EU market; ATEX is one of the specific regulations that explosive‑atmosphere equipment must satisfy to obtain that CE marking; and IECEx is an “international passport” designed for global mutual recognition.

    2026/06/30 TECO-ELEC 20

  • Common faults and countermeasures of reducers

    Since a reducer is a transmission device, many faults often occur during its operation due to external working conditions (e.g., bearing heavy loads) and internal factors.

    2026/06/12 TECO-ELEC 22

  • Relationship between Motor Torque and Motor Volume

    It can be stated boldly – and accurately – that the overall volume of a motor is determined by the torque it must produce: the larger the volume, the greater the torque. Of course, there may be exceptions to this rule, but as a general guideline for motor selection, it is very useful.

    2026/06/11 TECO-ELEC 30

  • What conditions need to be met for exporting motors to Taiwan?

    Low-voltage motors are subject to mandatory BSMI inspection and control, while high-voltage motors are not subject to this restriction. Currently, high-voltage motors have no mandatory energy efficiency regulations and do not require registration in any official system; they only need to comply with relevant specifications for high-voltage electrical equipment.

    2026/05/26 TECO-ELEC 16

  • What is the Korean KC certification?

    KC Certification (Korea Certification) is a mandatory certification implemented by the Korean government to ensure the safety of electronic products and consumer goods. The Korean market has strict requirements for product safety and quality, and obtaining KC Certification is crucial for products to enter the Korean market.

    2026/05/11 TECO-ELEC 17

  • Overview of Mexico's NOM and FIDE Certifications

    For Chinese companies planning to export products to Mexico, understanding the local compliance certification system is the first critical step to successfully entering the market. Among the various certifications in Mexico, NOM and FIDE are the two most relevant for electronic and electrical products. The former is a mandatory market access standard, while the latter is a voluntary energy efficiency label. This article provides a systematic overview of the key aspects of both certifications, offering practical compliance guidance for exporters.

    2026/04/23 TECO-ELEC 47

  • What is the difference between the routine test and the type test for high-voltage three-phase asynchronous motors?

    The core difference between the routine test (factory test) and the type test for high-voltage three-phase asynchronous motors is:
    The routine test is a "factory pass certificate" performed on every motor to verify the manufacturing quality of each unit. The type test is a "design validation report" performed on a sample from the same specification to verify the design and performance compliance of the entire series.

    2026/04/16 TECO-ELEC 49

  • Insulation Class of High-Voltage Three-Phase Asynchronous Motors

    The insulation class of high-voltage three-phase asynchronous motors is a core technical indicator defined based on the maximum allowable operating temperature of the insulation materials.

    2026/04/10 TECO-ELEC 73

  • Factors Affecting the Efficiency of High-Voltage Motors

    There are many factors that affect the efficiency of high-voltage motors, including motor body losses, operating conditions, design and structural factors, as well as installation, maintenance, and environment. A detailed analysis is provided below.

    2026/03/27 TECO-ELEC 33

  • Five core performance parameters of electric motors

    The five core performance parameters of a motor are key indicators for evaluating its performance, suitability for application scenarios, and selection criteria. They directly determine the operating state and effectiveness of the motor, including rated power, rated voltage, rated current, rated speed, and rated frequency.

    2026/02/11 TECO-ELEC 47

  • Three Types of Energy Efficiency Labeling for Imported Electric Motors in China

    The current mandatory Energy Efficiency Label catalog in China covers 38 product categories. Key motor-related products included are:
    • Permanent Magnet Synchronous Motors
    • High-Voltage Three-Phase Squirrel-Cage Induction Motors
    The implementation rules for these products are specified in the 2025 catalog. For Permanent Magnet Synchronous Motors, the new rules took effect on January 1, 2026. For High-Voltage Three-Phase Induction Motors, the rules will take effect on April 1, 2026.

    2026/02/11 TECO-ELEC 41

  • Conditions for Exempting Imported Motors in China from GB Energy Efficiency Certification

    For enterprises engaged in the business of importing motors for re-export, the application of these exemption clauses is subject to strict limitations. The key lies in proving that the motors are not for sale or use within China but are intended for re-export.

    2026/01/29 TECO-ELEC 75

  • Notice of Price Increase for TECO Electric Motor

    Driven by the persistent surge in raw material costs, TECO officially announced a price increase notice on January 5, 2026.

    2026/01/08 TECO-ELEC 184

  • CCC Mandatory Certification Scope for Imported Low-Voltage Motors in China

    The specific scope of CCC compulsory certification for low-voltage motors is as follows:It applies to low-power drive motors with a rated voltage above 36V (excluding 36V) and below DC 1500V or AC 1000V, including:

    2025/10/29 TECO-ELEC 93

  • Products Eligible for CCC Exemption and Required Documentation

    Components imported for the exclusive purpose of manufacturing finished products that will be entirely exported may apply for an exemption from CCC certification. The applicant must be the factory/company that uses these components.

    2025/10/29 TECO-ELEC 42

  • NEMA motor protection levels and comparison with IEC-IP code

    NEMA standard enclosure types and their corresponding application environments, and convert NEMA enclosure type ratings to ANSI/IEC 60529 enclosure classification designations (IP).

    2025/09/03 TECO-ELEC 74

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